I have found my car has not ever taken a liking towards optimax but goes well on bp ultimate and synergy 8000.. only problem i have with synergy it seems to burn to quick compared to ultimate. Does anybody actually know which one is better, cleaner.. etc..?
There was a topic regarding this not too long ago a lot of interesting info, if you do a search it should give you the info you need. I personally have used optimax and ultimate and can't really tell much difference between them.