can u use 4star in an rs turbo???? whys it better??? i s it as gud as shell optimax??? cheeRS

 

Im sure you can in a 90 spec RST as they have a knock sensor.Personally id use optimax/Super as they have more octaines(I think)

 

thats a good question, what petrol should u use in a s2 would normally unleaded be safe

 

ive tried optimax its pretty good noticed a massive difference. but ive heard of ppl using 4star want 2 knw wots best

 

optimax&super unleaded only

 

y nt 4star is it shite

 

optimax or super unleaded they burn the cleanest reducing a build up crap in your engine

 

ah rite cheers 4 ur replys optimax it is

 

4 star no longer exists as we know it. it was leaded and then the gouvrnment went all geenpeace on us and if you have old cars like all of our customers your fucked. The valves become coked and it runs like a cunt. But i havnt yet expirienced a cossie on unleaded but i know that optimax and all the others still produced bag performance on old cars naturally aspirated.
Sorry for the lecture
James

 

the s2 was developed to be used with leaded, but obviously optimax is the way nowadays

 

unfortunatly there is no alternative. You can get lead substitues to use with unleaded which on older cars are the best way around it.
Hope that helps guys
James

 

i thought the series 1 was ment for leaded but cus it has hardend valve seats can take unleaded! but series2 was for unleaded!

 

You can still get proper leaded 4 star in Nottingham but its a Ł1 a litre makes mine run very nice, but failing this i use super unleaded with no problems.

TTFN PaulT

 

Mine used to run on 4 star, had the hardened valve seats fitted at engine rebuild time to allow unleaded running, then optimax came out & tried it. Found no difference whatsoever in the running or economy..& the fuel computer range stopped working with optimax in. Went back to unleaded, & everything if fine again.

 

standard rst's can run both unleaded or optimax. all rst's running higher boosts like 16 psi have to use high RON fuels like optimax!