Hi all, Interested in peoples views/thoughts on the best rpm at say 30 to 40mph to obtain the best mpg in a diesel (mine is A3 2.0 tdi 140). First Diesel I have had and only had it a few weeks. I assumed it would be low revs so have been driving around towns and slow dual-tracks (40mph) in 5th and 6th gears. Ok, not planting my foot on the gas pedal but letting it slowly build speed. When coming to inclines moving down to 4th to prevent the engine from labouring (going below 1000rpm). Anyone got any views on this ? Better to keep the revs a bit higher ? even tho there are gears left that will happily keep the car at a constant speed ..? Ta.