Originally Posted by
fuzzy
mine is a 3 litre turbo diesel merc. I'm going to do some runs at the 1/4 mile then its going for a remap as well then itll be more 1/4 mile runs to compare after the remap. wasn't sure if its better to remap it for the better fuel or if itll make no difference whats its set up for.
if your going for a standard "stage 1" remap then it won't matter what you fill it with for remap, I have noticed better mpg and it does feel quicker with premium diesel in cars I've owned, but it's not critical like petrol, if your going to have a rolling road print out at the end of it then fill it with premium to make the numbers look good, fill it a few days before to let it run through the engine and the ecu should adjust slightly to the better fuel in the process, Tesco momentum is supposed to be the best then shell nitro or whatever they have decided to call it now, that's certainly the case with unleaded anyway.