Derating a 2.0 TDI for better fuel effiency.

[neil]

if you ran less fuel in the maps and less boost, you would get better economy (providing you werent trying to make up for the power loss by driving harder).

smaller capacity will usually allow lower fuel consumption for any given scenario... 2.0l down to 1.8 is a 10% reduction, and so that accounts for a fair chunk of the improvement.... maybe

Dealer says derating would cost more than the savings.

[Mischa]

Mischa.

I always give myself plenty of time to get to my destination, If I get the chance to slow down due to light traffic I do.
I do not hold up the traffic on the Newcastle/Sydney Fwy as anybody knowing this Fwy it would be a death sentence.
If I get the chance to slow down its usually at 90km/h.
If late at night it takes just over 10 mins extra if driving at 90km/h.

yep thats fine not having a go at you just seems like ultra low consumption

[neil]

yep thats fine not having a go at you just seems like ultra low consumption

Mischa
My dealer mentioned today my fuel economy fairly normal for a Jetta as the drivers are more economical with the right foot than Golf owners, especially the GT owners.

90% of my driving is on the Fwy. also try not to stop at the lights, just cruise up to them and go and this has also shown a big saving around town.

Just read your Audi S2 thread nice one.
Neil.

[brad]

Brad.
Running tyres at 40psi.
Not game to ask what the cost of roll resistance tyres are.
Neil.

Michelin do 2 or 3 versions. I think they universally label them ENERGY. eg MXV ENERGY...... /searches. These ones

My simple mind tells me that less resistance=less grip but we had the XM1 Energy as OEM on a Toyota Avensis Verso (people mover) and you had to drive like a ****head to make them lose grip.

In these days of speed cameras, wowsers & high fuel prices it's almost more fun trying to achieve ridiculously low fuel economy than going fast. (did I say that!)

[bluey]

Cheapest way to use less fuel is to put a bigger return spring on the accelerator.

Cruise control seems good at accelerating efficiently. Perhaps it could be modded to accelerate from rest.

Cheap fun is going round corners without slowing down (much).