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who's doing the mapping then?
i would suggest going to see paul up at RS tuning, mappers are hit and miss and sometimes a little bit of knowledge is a dangerous thing!
i remember being told once that an engine i'd built was "running a bit lean" with the AFR sitting at around 12:1...
they'll be no s**t in there, its not a ford anglia!!!
if i had just picked up a new car i would drain the oil out of it, put in some mineral oil, drive it like a bell end for a week or so and then whack in some decent oil, but hey thats me