Originally Posted by northiam
optimax or Ultimate whatever the weather really?
Don't run optimax. Of late it seems to be pretty ordinary. I put a tank in late Saturday and the car was almost instantly sluggish. I normally run Ultimate or Synergy. Optimax is also known for carboning plugs.
Keep Ultimate or Synergy in it and you will have less issues.
Although the weird thing is my 02 Mazda Astina goes well on optimax. Dare I say optimax works better on multivalve engines?