m http://homepage.ntlworld.com/johnnya/ma ... tm#optimax (http://homepage.ntlworld.com/johnnya/max-boost/fuelling.htm#optimax) m
Interesting reading...
I don't like the stuff personallly. I don't have any shell garages near me so i've always had to use esso super unleaded. When i came down to MK to tune, i did all this on a tank of this. On the way home i was running low so i thought i'd try the optimax. On the way back i actually had to alter the timing on my e-manage because i could hear pinking.
Not to say it isn't better for NA but if i've got to take timing out = less power then i'll leave it for others.
can I just be stupid, but what is pinking? Should i be using super unleaded in my non-turbo or just normal?
All I know is that my car feels a lot more responsive since I put Optimax in. So much so, that even the WTB commented on it!
I haven't got a clue about the technical side of engines or petrol, but I trust my senses 100%.
I use optimax wherever possible, mainly due to it being shown to at least clean the fuel deposits from the engine.
In terms of improved performance, I can't honestly say that I have noticed any difference.
It does seem surprising that Shell put out all that advertising about it turning your allegro into a porsche, without being able to back this up properly... s:? :? s:?
Well as I mentioned before i'll never put Optimax in again. Shell won't aknowledge what it puts in to make it 98 ron..the most commonly used additive is Tetra Lythal which will eat a cat. Two mechanics have said not to use it..and this article adds further doubt in my mind. Plus I've been having good results on BP ultimate
Hmmm I wouldn't mind knowing what petrol was regularly used by those owners of cars which have experienced pre cat failures. Unfortunately I don't seem to be able to create a poll.
Well i've always used Optimax before my cat failure, every time. Not again. I had an interview with Shell recently..and he laughed when i started waffling about Optimax and the premium pricing it had acheived..he basically admitted there was no difference
I have taken mine off of Optimax for a few reasons, running on Shell normal unleaded and can honestly say I think that it runs alot better and seems more responsive. Just my 2p worth.
The MR2 will never gain power from it, might clean it a little better but I don't even bother with it in my VX. Just no point.
Quote from: "MRMike"the most commonly used additive is Tetra Lythal which will eat a cat.
So do screwdrivers. s:wink: :wink: s:wink:
I run my car on whatever comes to hand when the fuel light comes on, with the exception of Supermarket fuel, which I wouldnt put in my lawnmower. I run on either regular or super depending upon which pump is free at the time, and Optimax If I happen to have pulled into a shell station. I used to try and run on Optimax as far as possible, but even in London, theres hardly any shell garages near me. s:roll: :roll: s:roll:
Personally I dont think theres a link between optimax and cat failure.
I run the Westie on it because it's an old engine designed originally to run on 4* and I had the thing set up on it. But I flipped back to regular unleaded a while back and to be honest, couldn't really notice the difference. I used to think it made a noticable difference but I think it was mostly psychological.