i think your missing the point cornish pixie.

I'm not saying that your chosen oil isn't up to the job, what i'm saying is that it is widely recongised that mobil 1 (as well as others) is the oil of choice !!!

you say your stuff is cheap and that's a bonus, if cost cutting is your thing then a cosworths not really the motor for you !!!

your right in that cheapo oil wont bring about a costly rebuild straight away, but it will certainly bring it on sooner than good oil.

paul