Saving Fuel/MPG Guide v1.11111111 - inc Torque Figures, Tyre Pressures, Rated MPG

[Barry123]

diesel is a slightly different technology as its based on cetane and not octane (although both exist in both petrol and derv) then engine (the old ones such as TUD) have no engine management as such. Its been tested infact on a TUD engine, that bp ultimate did offer gains.

your friend may find going for standard (not cheap tho) fuel then adding a fuel additive even now and again will probably prove more cost effective

[ham1]

What about turning engine off at traffic lights/queues etc? Does starting up again use more fuel than you save from killing the engine for 5-10 secs?

[Barry123]

Originally Posted by ham1

What about turning engine off at traffic lights/queues etc? Does starting up again use more fuel than you save from killing the engine for 5-10 secs?

there is, as I remember, quite a bit of debate over this matter... however... citroen brought out a c3 with a start/stop function recently... basically the engine would cut out at traffic lights and by a light press on the accelerator would kick in again. they reckon decent savings could be made on fuel.

so on that assumption I'd guess that turning off the engine at traffic lights could provide some small gains, although I wouldnt recommend killing the engine if you're at the front of the queue... you might upset the people behind you if they're waiting a while lol


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[ham1]

Hehe yeah if you were at the front or quite near the front then might not be good. Although I read somewhere that in some country its the law, if you are 3rd or more in a queue at traffic lights, to kill your engine.

I suppose also if you are in a queue going down a hill then you could get most of the way with out the engine on.. although that is probably illegal or something...

[Barry123]

Originally Posted by ham1

I suppose also if you are in a queue going down a hill then you could get most of the way with out the engine on.. although that is probably illegal or something...

extreme coasting like that is typically frowned upon by the highway code and stuff as most modern cars lose power steering and brake assistance. I remember doing it quite a lot in the C3 only to find that my brakes would quickly fail.

sticking it in neutral could be done however research suggests that leaving the car in gear and letting the car coast actually saves more fuel

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[KamRacing]

turn your ignition off and your steering lock will come on. Could get interesting lol

[Barry123]

Originally Posted by KamRacing

turn your ignition off and your steering lock will come on. Could get interesting lol

only if your keys are out of the ignition???

[KamRacing]

There are a few notches on the ignition.
Off - you can pull the key out and steering lock engages
one notch - power to radio etc
two notches - ignition on
further to start engine.

Personally I wouldnt risk turning too far lol

[smearsvtr]

will having a de-cat lower fuel comsumption?

[SaxoJamie]

Good guide mate What's the best gear to use when driving on a 60mph single carriageway on quite a straight road bar a few bends?. Is it best to leave it in 4th if not continuously holding 60mph but staying closer to the peak torque figure and making the most of engine braking? Please help as I'm confused lol

[Barry123]

If you're cruising... i.e. maintaining a constant speed... put it in top. that goes for just about any speed except below 20mph or something

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[Wayne]

excellent guide ad

[Barry123]

tbh i want to rewrite but i have two problems at the moment:

1) not enough time
2) cant be arsed

[Clone]

nice guide there,that some nice milage you got there guess you save a good few ££ compaired to people with VTS/VTRS. I get about 310-320 to a tank which is almost full ( Doesn't click at the pump ) filled it up yesterday to brim so will see what i get. ( i have a heavy load going to work also )

[Paulp]

Hi adsayer, im no good at maths and what not, so can you work this out for me pretty please

I drove my car til it was 99% empty of petrol. I then filled up £10 of petrol at £1.02 a litre. This lasted me 98 miles. This was a evenish mixture of motorway driving and town driving.

Does that sound about right?

My cars a VTR, 98bhp model. I drive about 80 on motorways, I have an open air filter atm, (fitting the casing soon to make in enclosed dont worry).

Rep waiting

[Barry123]

Originally Posted by Paul_CGM

Hi adsayer, im no good at maths and what not, so can you work this out for me pretty please

I drove my car til it was 99% empty of petrol. I then filled up £10 of petrol at £1.02 a litre. This lasted me 98 miles. This was a evenish mixture of motorway driving and town driving.

Does that sound about right?

My cars a VTR, 98bhp model. I drive about 80 on motorways, I have an open air filter atm, (fitting the casing soon to make in enclosed dont worry).

Rep waiting

No probs man!
nice one, you got about 45-46MPG by the sounds of it. which is pretty good considering the mixture of driving you've done.

good engine and transmission by the sounds of things

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[Paulp]

Cheers mate

[dianahepworth]

Y'know - This was super useful!
Thanks!

[JC-Furio]

Old thread but pretty useful, just thought it was mainly driving style and weight which affected MPG. Didn't think that the weather would, nice one

[Barry123]

thanks everyone