[mizzsnazzter]

Okay so im driving to college now, and i have the smallest engine you can get.. i think its 1.2 .... my dad says it will cost 10p/mile... is that about right?

[Lampshade]

(Original post by mizzsnazzter)
Okay so im driving to college now, and i have the smallest engine you can get.. i think its 1.2 .... my dad says it will cost 10p/mile... is that about right?

1. a 1.2 is not the smallest engine you can get.

2. It depends on the car, weight of contents of the car, tyre pressure, road surface etc etc etc

[alixxxxxx1]

i dont really see why you'd need to look at it as cost per mile.
work out how much it costs to fill up your tank, and then how many miles this gives you and that way you can work out the cost per mile.
and anyway i think its more 15-20p

[mizzsnazzter]

(Original post by Lampshade)
1. a 1.2 is not the smallest engine you can get.

2. It depends on the car, weight of contents of the car, tyre pressure, road surface etc etc etc

well just roughly, for a small car, nothing in the car, and smooth surface, yknow general driving

[mizzsnazzter]

(Original post by alixxxxxx1)
i dont really see why you'd need to look at it as cost per mile.
work out how much it costs to fill up your tank, and then how many miles this gives you and that way you can work out the cost per mile.
and anyway i think its more 15-20p

Thats what i thought, and im trying to work it out soon because my dad will only pay for me to drive to school and not to work so i need to work out the mileage etc....

[Lampshade]

(Original post by mizzsnazzter)
well just roughly, for a small car, nothing in the car, and smooth surface, yknow general driving

it depends on so many things. Your driving style is another factor.

[madsporkmurderer]

If you want cheap motoring get a 125- over a hundred miles to the gallon, 15quid a year tax, insurance for a few hundred, and you can't wheelie a car

[alixxxxxx1]

(Original post by mizzsnazzter)
Thats what i thought, and im trying to work it out soon because my dad will only pay for me to drive to school and not to work so i need to work out the mileage etc....

ohhh i see....wel id say 20p a mile.
maybe just agree say £5 a week if your school is 2 miles away...£10 if 4 miles etc...

[visesh]

(Original post by madsporkmurderer)
If you want cheap motoring get a 125- over a hundred miles to the gallon, 15quid a year tax, insurance for a few hundred, and you can't wheelie a car

But, you're much less likely to become an organ donor in a car.

[CLF]

is it true that going in a higher gear uses less petrol?

[lodzinski]

10p per mile is probably only about petrol cost. It's what GM pay in expenses for petrol anyway (having said that VW pay 40p :O ) once you take tax, consumables, car, servicing, insurance etc, it's more like double that, decreasing if you do lots of miles.

[mizzsnazzter]

(Original post by alixxxxxx1)
ohhh i see....wel id say 20p a mile.
maybe just agree say £5 a week if your school is 2 miles away...£10 if 4 miles etc...

well my school is 10miles away, and im getting £10 a week...

[terpineol]

If i push it I can get 50 to the gallon, petrol is 82p a litre at the moment, so that comes to 13.2p a mile in petrol.

Though the total cost of running a car is much more.

I think to cover everything you probably want to look at about 30p a mile.

[joeyXCORE]

(Original post by CLF)
is it true that going in a higher gear uses less petrol?

Higher gear = less revs = less fuel injected into engine so yeah

If you want to be fuel efficient you should be in 5th for any sustained travel at 30mph+

[Cj-Tj]

(Original post by terpineol)
If i push it I can get 50 to the gallon, petrol is 82p a litre at the moment, so that comes to 13.2p a mile in petrol.

Check your maths, 36mpg costs me 10.5ppm.

But total running costs are 60ppm, if you include depreciation, fuel, tyres, insurance, etc etc.

If your charging your dad, charge him 20ppm each way, so 10 miles away would be £4 a day. £20 a week sounds about right, but at what your getting from him at the minuet you'll maybe just cover petrol. Depends how much profit you want to make.

[Cj-Tj]

(Original post by joeyXCORE)
Higher gear = less revs = less fuel injected into engine so yeah

If you want to be fuel efficient you should be in 5th for any sustained travel at 30mph+

5th at 30 would be less efficient than 4th a 30. Your engine in 5th will be just over tickover and if you need more power, going up a hill, accelerating, etc, it will have to inject loads of fuel to try and make up for having such low torque.

[mr_cool]

If you are doing a short trip to college you will get less miles for your pennies. This is because the car has to warm up, heat the engine block and oil and by that time your at college and it cools down again.

[joeyXCORE]

(Original post by Cj-Tj)
5th at 30 would be less efficient than 4th a 30. Your engine in 5th will be just over tickover and if you need more power, going up a hill, accelerating, etc, it will have to inject loads of fuel to try and make up for having such low torque.

Sorry yeah i meant on a straight road at constant speed though

[terpineol]

(Original post by mizzsnazzter)
Okay so im driving to college now, and i have the smallest engine you can get.. i think its 1.2 .... my dad says it will cost 10p/mile... is that about right?

Mine's smaller than yours! I've got 0.6!

First and last time I get to boast on being smaller in a department methinks on a motoring forum!

Assuming the principals hold true for a modern car in terms of fuel use, I know that to do 30 in 4th (4 speed gear box), I'm on both chokes, whereas for 30 in third only the small one opens up. Straight line and speed etc.

Could you wire up a vacuum gauge to incestigate this?



[that typo ticked me so much on proof reading I'm going to leave it in, maybe even make it habit]

[JC.]

It costs what it costs.
That is all.