Torque Cars chat forums - View Single Post - Diesel mpg

pgarner · 22-02-2008, 10:03 AM

under revving is where the ecu is kicking in and pumping in more fuel.

yes changing at 4k rather than 3k will use more fuel. but so will under revving as the ecu will kick in and pump more fuel in to save the engine from effectively stalling

as a little test go out and accelerate to 60mph (national speed limit so your not speeding) by changing up at around 3500rpm and take a note of your average then reset it and do it again changing up at 1800 rpm, so your accelerating from around 1200rpm putting the car under strain and see what you get i would say the 1st run would be more economical

22-02-2008, 10:03 AM	#8 (permalink)
pgarner Super Moderator Torque Junkie Car: VW Bora (184.6bhp) Join Date: Jul 2007 Location: Lockerbie, SW Scotland Posts: 2,893	Re: Diesel mpg - way of driving? under revving is where the ecu is kicking in and pumping in more fuel. yes changing at 4k rather than 3k will use more fuel. but so will under revving as the ecu will kick in and pump more fuel in to save the engine from effectively stalling as a little test go out and accelerate to 60mph (national speed limit so your not speeding) by changing up at around 3500rpm and take a note of your average then reset it and do it again changing up at 1800 rpm, so your accelerating from around 1200rpm putting the car under strain and see what you get i would say the 1st run would be more economical __________________ Good news !! Winter is on the way !!