Registered Forum User
Big Twin
Posts: 1,420
Join Date: Apr 2004
Location: Nelson, Lancashire
I remember Evo magazine testing Optimax about 4 or 5 years ago they did report better running and more mpg. If I remember correctly they ran a V8 Jaguar XJR on it and said at the time that you had to run the car on the stuff for a few thousand miles before it started to improve things. At that time I had to use super unleaded in the car I had then (Evo 6) and cant honestly say I noticed any difference!? However as the nearest Shell station was miles away it was not run exclusivley on Optimax.
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