So Lou is saying it now costs her around £12.50 to work and back.

80 mile round trip if using the M1 and 72 mile round trip if using the
A1. She uses whichever google maps says is fastest/no roads closed etc.

So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
car that does 65MPG when she drives it which is the cheapest car to use
for Lou to get to work and back?

--
Adam

On 29/04/2022 19:37, ARW wrote:
> So Lou is saying it now costs her around £12.50 to work and back.
In her car

On 29/04/2022 19:37, ARW wrote:
> So Lou is saying it now costs her around £12.50 to work and back.
>
> 80 mile round trip if using the M1 and 72 mile round trip if using the
> A1. She uses whichever google maps says is fastest/no roads closed etc.
>
>
> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
> car that does 65MPG when she drives it which is the cheapest car to use
> for Lou to get to work and back?
>

Yours because she will drive it and you will refill it so it wont cost
her anything.

On 29/04/2022 19:37, ARW wrote:
> So Lou is saying it now costs her around £12.50 to work and back.
>
> 80 mile round trip if using the M1 and 72 mile round trip if using the
> A1. She uses whichever google maps says is fastest/no roads closed etc.
>
>
> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
> car that does 65MPG when she drives it which is the cheapest car to use
> for Lou to get to work and back?
>

65 MPG is about 14.3 miles per litre, so she would use 5.6 or 5.0 litres
in your car at a cost of £9.63 or £8.60 depending on which route she takes.

Assuming that the £12.50 is just for fuel, and not including any
overheads, your car is cheaper.
--
Cheers,
Roger

ARW <adamwadsworth@blueyonder.co.uk> wrote:
> So Lou is saying it now costs her around £12.50 to work and back.
>
> 80 mile round trip if using the M1 and 72 mile round trip if using the
> A1. She uses whichever google maps says is fastest/no roads closed etc.
>
>
> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
> car that does 65MPG when she drives it which is the cheapest car to use
> for Lou to get to work and back?
>

An EV (if she can charge at home). ;-)

(An 80 mile trip currently costs me £1.14 on cheap rate electricity at
night).

Tim

--
Please don't feed the trolls

On 29/04/2022 20:24, Tim+ wrote:
> ARW <adamwadsworth@blueyonder.co.uk> wrote:
>> So Lou is saying it now costs her around £12.50 to work and back.
>>
>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>
>>
>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
>> car that does 65MPG when she drives it which is the cheapest car to use
>> for Lou to get to work and back?
>>
>
> An EV (if she can charge at home). ;-)

and you don't include the cost of buying something he doesn't already have..

>
> (An 80 mile trip currently costs me £1.14 on cheap rate electricity at
> night).
>
> Tim
>

--
Colin Bignell

On Sat, 30 Apr 2022 05:24:45 +1000, Tim+ <tim.downie@gmail.com> wrote:

> ARW <adamwadsworth@blueyonder.co.uk> wrote:
>> So Lou is saying it now costs her around £12.50 to work and back.
>>
>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>
>>
>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
>> car that does 65MPG when she drives it which is the cheapest car to use
>> for Lou to get to work and back?
>>
>
> An EV (if she can charge at home). ;-)
>
> (An 80 mile trip currently costs me £1.14 on cheap rate electricity at
> night).

Pity about the cost of buying one.

On 29/04/2022 20:24, Tim+ wrote:
> ARW <adamwadsworth@blueyonder.co.uk> wrote:
>> So Lou is saying it now costs her around £12.50 to work and back.
>>
>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>
>>
>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
>> car that does 65MPG when she drives it which is the cheapest car to use
>> for Lou to get to work and back?
>>
>
> An EV (if she can charge at home). ;-)
>
> (An 80 mile trip currently costs me £1.14 on cheap rate electricity at
> night).
>

And when your battery is fucked my Skoda and her Peugeot have many miles
left..

Colin Bignell <cpb@bignellREMOVETHIS.me.uk> wrote:
> On 29/04/2022 20:24, Tim+ wrote:
>> ARW <adamwadsworth@blueyonder.co.uk> wrote:
>>> So Lou is saying it now costs her around £12.50 to work and back.
>>>
>>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>>
>>>
>>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
>>> car that does 65MPG when she drives it which is the cheapest car to use
>>> for Lou to get to work and back?
>>>
>>
>> An EV (if she can charge at home). ;-)
>
> and you don't include the cost of buying something he doesn't already have..

Well I think most people would work that out for themselves. I make no
apologies for highlighting just how cheap the fuel cost of an EV can be
though. Useful info for anyone with a car change potentially in the
pipeline.

Tim

--
Please don't feed the trolls

On 29/04/2022 21:28, Tim+ wrote:
> Colin Bignell <cpb@bignellREMOVETHIS.me.uk> wrote:
>> On 29/04/2022 20:24, Tim+ wrote:
>>> ARW <adamwadsworth@blueyonder.co.uk> wrote:
>>>> So Lou is saying it now costs her around £12.50 to work and back.
>>>>
>>>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>>>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>>>
>>>>
>>>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
>>>> car that does 65MPG when she drives it which is the cheapest car to use
>>>> for Lou to get to work and back?
>>>>
>>>
>>> An EV (if she can charge at home). ;-)
>>
>> and you don't include the cost of buying something he doesn't already have..
>
> Well I think most people would work that out for themselves. I make no
> apologies for highlighting just how cheap the fuel cost of an EV can be
> though. Useful info for anyone with a car change potentially in the
> pipeline.

Except that it had nothing to do with the question. That was which of
the two existing vehicles would be cheaper to use.

--
Colin Bignell

On 4/29/2022 4:15 PM, ARW wrote:
> On 29/04/2022 20:24, Tim+ wrote:
>> ARW <adamwadsworth@blueyonder.co.uk> wrote:
>>> So Lou is saying it now costs her around £12.50 to work and back.
>>>
>>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>>
>>>
>>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
>>> car that does 65MPG when she drives it which is the cheapest car to use
>>> for Lou to get to work and back?
>>>
>>
>> An EV (if she can charge at home). ;-)
>>
>> (An 80 mile trip currently costs me £1.14 on cheap rate electricity at
>> night).
>>
>
> And when your battery is fucked my Skoda and her Peugeot have many miles left..
>

I think you're within range of a few solutions.

Tesla Model 3 Long Range \
EPA range: 353 miles \
Fast-charging: Up to 200 miles in 15 minutes \___ Adjusting for cold weather
Price: $51,190 / devaluation, this would work. Charge at home.

"Model 3 Long Range tops out at 145 mph."

The range is not 353 miles, at 145 mph :-)

It's not the top range, it's not the top price.

And by charging the vehicle at home, it helps the
battery surpass the warranty guarantee. Home charging
is ideal for lifecycle cost.

Tesla is playing with both Lithium Cobalt and
Lithium Iron Phosphate *in the same car*. The Chinese
delivered models, are all Iron Phosphate. Some of the
American made ones are also arriving with Iron Phosphate
in them. And there's no notation on the vehicle indicating
which tech they got. You would think the physical size
of the battery pack, would be different for those two.

Since it's an LR, maybe it will remain LiCo for a while.

The Mini Electric is 145 miles range. And still has
a high enough speed, to drive on a highway. You'd want
a more understanding employer though (outlet in parking
spot would be nice for gradual top-up). The Tesla choice,
you could do all the charging at home, and still not
be getting back with zero on the readout.

Your hypothetical trip is tailor made for a BEV.
Since you own two cars, you could keep one fossil
fuel car to avoid "charging on the road" on long trips.

ICE cars are meant to be driven. There's no advantage
in this case, to leaving the ICE parked and only
driving it one a year, as the maintenance cost goes
up if you do that (dead 12V battery, rusty rotors).
One person could drive the BEV to work. One person
could drive a diesel to work. And keep the fluids
in the car well mixed and the rotors clean.

And you do want to read the anecdotal discussion
threads, regarding getting repairs done, getting
issues resolved, weird charging behavior, and so on,
before you make a purchase.

Paul

On Sat, 30 Apr 2022 12:57:22 +1000, Paul <nospam@needed.invalid> wrote:

> On 4/29/2022 4:15 PM, ARW wrote:
>> On 29/04/2022 20:24, Tim+ wrote:
>>> ARW <adamwadsworth@blueyonder.co.uk> wrote:
>>>> So Lou is saying it now costs her around £12.50 to work and back.
>>>>
>>>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>>>> A1. She uses whichever google maps says is fastest/no roads closed
>>>> etc.
>>>>
>>>>
>>>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for
>>>> my
>>>> car that does 65MPG when she drives it which is the cheapest car to
>>>> use
>>>> for Lou to get to work and back?
>>>>
>>>
>>> An EV (if she can charge at home). ;-)
>>>
>>> (An 80 mile trip currently costs me £1.14 on cheap rate electricity at
>>> night).
>>>
>> And when your battery is fucked my Skoda and her Peugeot have many
>> miles left..
>>
>
> I think you're within range of a few solutions.
>
> Tesla Model 3 Long Range \
> EPA range: 353 miles \
> Fast-charging: Up to 200 miles in 15 minutes \___ Adjusting for cold
> weather
> Price: $51,190

So no chance of that paying for itself any decade soon, by which time the
battery is fucked.

> / devaluation, this would work.
> Charge at home.
> `
> "Model 3 Long Range tops out at 145 mph."
>
> The range is not 353 miles, at 145 mph :-)
>
> It's not the top range, it's not the top price.
>
> And by charging the vehicle at home, it helps the
> battery surpass the warranty guarantee. Home charging
> is ideal for lifecycle cost.

But still wouldn't pay for itself before the battery is fucked.

> Tesla is playing with both Lithium Cobalt and
> Lithium Iron Phosphate *in the same car*. The Chinese
> delivered models, are all Iron Phosphate. Some of the
> American made ones are also arriving with Iron Phosphate
> in them. And there's no notation on the vehicle indicating
> which tech they got. You would think the physical size
> of the battery pack, would be different for those two.
>
> Since it's an LR, maybe it will remain LiCo for a while.
>
> The Mini Electric is 145 miles range. And still has
> a high enough speed, to drive on a highway. You'd want
> a more understanding employer though (outlet in parking
> spot would be nice for gradual top-up). The Tesla choice,
> you could do all the charging at home, and still not
> be getting back with zero on the readout.
>
> Your hypothetical trip is tailor made for a BEV.

Nothing hypothetical about it.

> Since you own two cars, you could keep one fossil
> fuel car to avoid "charging on the road" on long trips.
>
> ICE cars are meant to be driven. There's no advantage
> in this case, to leaving the ICE parked and only
> driving it one a year, as the maintenance cost goes
> up if you do that (dead 12V battery,

Trivially avoidable with a charger.

> rusty rotors).

Trivially avoidable with a garage.

> One person could drive the BEV to work. One person
> could drive a diesel to work.

He parks the work van at home.

> And keep the fluids
> in the car well mixed and the rotors clean.

But then would have to pay for the fuel, stupid.

> And you do want to read the anecdotal discussion
> threads, regarding getting repairs done, getting
> issues resolved, weird charging behavior, and so on,
> before you make a purchase.

Makes more sense to not even consider an EV at all.

Colin Bignell <cpb@bignellREMOVETHIS.me.uk> wrote:
> On 29/04/2022 21:28, Tim+ wrote:
>> Colin Bignell <cpb@bignellREMOVETHIS.me.uk> wrote:
>>> On 29/04/2022 20:24, Tim+ wrote:
>>>> ARW <adamwadsworth@blueyonder.co.uk> wrote:
>>>>> So Lou is saying it now costs her around £12.50 to work and back.
>>>>>
>>>>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>>>>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>>>>
>>>>>
>>>>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
>>>>> car that does 65MPG when she drives it which is the cheapest car to use
>>>>> for Lou to get to work and back?
>>>>>
>>>>
>>>> An EV (if she can charge at home). ;-)
>>>
>>> and you don't include the cost of buying something he doesn't already have..
>>
>> Well I think most people would work that out for themselves. I make no
>> apologies for highlighting just how cheap the fuel cost of an EV can be
>> though. Useful info for anyone with a car change potentially in the
>> pipeline.
>
> Except that it had nothing to do with the question. That was which of
> the two existing vehicles would be cheaper to use.
>

Which is why I added a smiley as it wasn’t a serious suggestion for Adam.

Tim

--
Please don't feed the trolls

On 30/04/2022 03:57, Paul wrote:

>
> The range is not 353 miles, at 145 mph :-)

From a previous thread the range is not 353 miles at 70 mph
and if used with a heater or AC probably more like half the quoted range.

>
> It's not the top range, it's not the top price.

It will be in UK the when the various taxes are applied to the purchase
price (20% VAT). Plus, the Government have realised that they are losing
out on fuel duty.

--
mailto : news {at} admac {dot} myzen {dot} co {dot} uk

On 30/04/2022 07:19, Tim+ wrote:
> Colin Bignell <cpb@bignellREMOVETHIS.me.uk> wrote:
>> On 29/04/2022 21:28, Tim+ wrote:
>>> Colin Bignell <cpb@bignellREMOVETHIS.me.uk> wrote:
>>>> On 29/04/2022 20:24, Tim+ wrote:
>>>>> ARW <adamwadsworth@blueyonder.co.uk> wrote:
>>>>>> So Lou is saying it now costs her around £12.50 to work and back.
>>>>>>
>>>>>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>>>>>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>>>>>
>>>>>>
>>>>>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
>>>>>> car that does 65MPG when she drives it which is the cheapest car to use
>>>>>> for Lou to get to work and back?
>>>>>>
>>>>>
>>>>> An EV (if she can charge at home). ;-)
>>>>
>>>> and you don't include the cost of buying something he doesn't already have..
>>>
>>> Well I think most people would work that out for themselves. I make no
>>> apologies for highlighting just how cheap the fuel cost of an EV can be
>>> though. Useful info for anyone with a car change potentially in the
>>> pipeline.
>>
>> Except that it had nothing to do with the question. That was which of
>> the two existing vehicles would be cheaper to use.
>>
>
> Which is why I added a smiley as it wasn’t a serious suggestion for Adam.
>

As she only travels to work and back twice a week (occasionally three
times) it will be cheaper to keep her existing 7 year old car for now:-)

It has stupid low mileage on it as before it was 4 miles to work four or
five days a week.

On 29/04/2022 19:37, ARW wrote:
> So Lou is saying it now costs her around £12.50 to work and back.
>
> 80 mile round trip if using the M1 and 72 mile round trip if using the
> A1. She uses whichever google maps says is fastest/no roads closed etc.
>
>
> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
> car that does 65MPG when she drives it which is the cheapest car to use
> for Lou to get to work and back?

I recently started to look at my fuel cost to see which routes were best
for my commute.
The round trip is about 35 miles and there are several routes I can
take, the preferred being on roads with a 40mph limit and often
encounter ponies/ donkeys/cattle .
Using data from the trip computer, I average 51mpg with petrol at
£1.64/litre costing £0.14 per mile.
If I drive like I shouldn't, that changes quite a bit.

Does Lou drive your car more carefully and hers like it's stolen?

On 29/04/2022 19:50, mm0fmf wrote:
> On 29/04/2022 19:37, ARW wrote:
>> So Lou is saying it now costs her around £12.50 to work and back.
>>
>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>
>>
>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for
>> my car that does 65MPG when she drives it which is the cheapest car to
>> use for Lou to get to work and back?
>>
>
> Yours because she will drive it and you will refill it so it wont cost
> her anything.

You have met her then?

She has done that twice.

On 30/04/2022 07:40, Richard wrote:
> On 29/04/2022 19:37, ARW wrote:
>> So Lou is saying it now costs her around £12.50 to work and back.
>>
>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>
>>
>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for
>> my car that does 65MPG when she drives it which is the cheapest car to
>> use for Lou to get to work and back?
>
> I recently started to look at my fuel cost to see which routes were best
> for my commute.
> The round trip is about 35 miles and there are several routes I can
> take, the preferred being on roads with a 40mph limit and often
> encounter ponies/ donkeys/cattle .
> Using data from the trip computer, I average 51mpg with petrol at
> £1.64/litre costing £0.14 per mile.
> If I drive like I shouldn't, that changes quite a bit.
>
> Does Lou drive your car more carefully and hers like it's stolen?

No. She does about same speed in both.

Her car is a 1L Peugeot 107 that has no power or acceleration on a
motorway/dual carriageway and when you get to 70MPH you get the urge to
get out and give it a shove.

Mine is not fast (1.6Tdi Octavia) but it gets up to 90MPH in a
reasonable time so you can pass the 67MPH middle lane hoggers easily.

On 29/04/2022 19:37, ARW wrote:
> So Lou is saying it now costs her around £12.50 to work and back.
>
> 80 mile round trip if using the M1 and 72 mile round trip if using the
> A1. She uses whichever google maps says is fastest/no roads closed etc.
>
>
> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
> car that does 65MPG when she drives it which is the cheapest car to use
> for Lou to get to work and back?
>

After skimming the thread to date I think you can probably justify
whichever answer you want ;)

There looks to be a clear saving from her using your car if we look only
at the fuel costs. But there are lots of other costs. E.g. (in no
particular order):

wear & tear: e.g. which car's tyres are more expensive to replace?

depreciation - higher mileage reduces value so usually bigger for more
valuable car

insurance - significant increase in your mileage/decrease in hers [point
to watch on hers given it's a new job?; /possibly/ even issue about who
is main driver?]

servicing

--
Robin
reply-to address is (intended to be) valid

On Sat, 30 Apr 2022 17:27:48 +1000, Robin <rbw@outlook.com> wrote:

> On 29/04/2022 19:37, ARW wrote:
>> So Lou is saying it now costs her around £12.50 to work and back.
>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for
>> my car that does 65MPG when she drives it which is the cheapest car to
>> use for Lou to get to work and back?
>>
>
> After skimming the thread to date I think you can probably justify
> whichever answer you want ;)

No.

> There looks to be a clear saving from her using your car if we look only
> at the fuel costs. But there are lots of other costs.

None of which will change which is best for her to use.

> E.g. (in no particular order):

> wear & tear: e.g. which car's tyres are more expensive to replace?

There isn't anything in it now that we now what both cars are.

> depreciation - higher mileage reduces value so usually bigger for more
> valuable car

But the way those 2 do cars, unlikely to change which is the best car for
her to drive.

> insurance - significant increase in your mileage/decrease in hers

Again, unlikely to change which is the best car for her to drive.

> [point to watch on hers given it's a new job?; /possibly/ even issue
> about who is main driver?]

They don't have to be told.

> servicing

Again, unlikely to change which is the best car for her to drive.

On 30/04/2022 07:41, ARW wrote:
>> Yours because she will drive it and you will refill it so it wont cost
>> her anything.
>
> You have met her then?
>
> She has done that twice.

I think I can count on one hand the number of times my other half has
fueled either of our cars!

On 30/04/2022 07:54, ARW wrote:
> On 30/04/2022 07:40, Richard wrote:
>> On 29/04/2022 19:37, ARW wrote:
>>> So Lou is saying it now costs her around £12.50 to work and back.
>>>
>>> 80 mile round trip if using the M1 and 72 mile round trip if using
>>> the A1. She uses whichever google maps says is fastest/no roads
>>> closed etc.
>>>
>>>
>>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for
>>> my car that does 65MPG when she drives it which is the cheapest car
>>> to use for Lou to get to work and back?
>>
>> I recently started to look at my fuel cost to see which routes were
>> best for my commute.
>> The round trip is about 35 miles and there are several routes I can
>> take, the preferred being on roads with a 40mph limit and often
>> encounter ponies/ donkeys/cattle .
>> Using data from the trip computer, I average 51mpg with petrol at
>> £1.64/litre costing £0.14 per mile.
>> If I drive like I shouldn't, that changes quite a bit.
>>
>> Does Lou drive your car more carefully and hers like it's stolen?
>
>
> No. She does about same speed in both.
>
> Her car is a 1L Peugeot 107 that has no power or acceleration on a
> motorway/dual carriageway and when you get to 70MPH you get the urge to
> get out and give it a shove.
>
> Mine is not fast (1.6Tdi Octavia) but it gets up to 90MPH in a
> reasonable time so you can pass the 67MPH middle lane hoggers easily.

Mine is a 1L 3 cylinder Hyundai i30. Has surprisingly good performance
due to the turbo.
In just over two years, from fill up to fill up the worst is 37 and best
48mpg.

In article <t4hb8j$9np$1@dont-email.me>,
ARW <adamwadsworth@blueyonder.co.uk> wrote:
> So Lou is saying it now costs her around £12.50 to work and back.

> 80 mile round trip if using the M1 and 72 mile round trip if using the
> A1. She uses whichever google maps says is fastest/no roads closed etc.

> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
> car that does 65MPG when she drives it which is the cheapest car to use
> for Lou to get to work and back?

And you complain about the lack of education of your apprentices? ;-)

She is currently paying between 17.4 and 15.6p a mile

Based on your figures, your car will cost 12p per mile.

--
*I'd kill for a Nobel Peace Prize *

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

On 29/04/2022 07:37 pm, ARW wrote:

> So Lou is saying it now costs her around £12.50 to work and back.
>
> 80 mile round trip if using the M1 and 72 mile round trip if using the
> A1. She uses whichever google maps says is fastest/no roads closed etc.
>
> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for my
> car that does 65MPG when she drives it which is the cheapest car to use
> for Lou to get to work and back?

Missing data: how many mpg in "her car"?

On 30/04/2022 12:35, JNugent wrote:
> On 29/04/2022 07:37 pm, ARW wrote:
>
>> So Lou is saying it now costs her around £12.50 to work and back.
>>
>> 80 mile round trip if using the M1 and 72 mile round trip if using the
>> A1. She uses whichever google maps says is fastest/no roads closed etc.
>>
>> So based on £1.59/L for unleaded on her car a and £1.72/L diesel for
>> my car that does 65MPG when she drives it which is the cheapest car to
>> use for Lou to get to work and back?
>
> Missing data: how many mpg in "her car"?

Work it out.