Thanks guys,
Paul,
I ONLY fill up with BP Ultimate, have never put anything else in. The MAF is only 4 months old (2Kms), can't see it being dirty already, but maybe?
Turbo,
I rang Porsche Melb. they suggested not to put any additive in? I guess that's their way of getting me in and milking me
?
Cheers for the advise