COSSIE 1

My erst is running about 230bhp whats the best fuel to put in it?? superunleaded or optimax....also if i was to drive a lond distance with minimal hard acceleration would unleaded be ok or would that cause damage . cheers

Tony Turbo

Do not run it on Unleaded. The other option is up to you, personally I avoid Optimax. I mostly use Esso SUL or BP.

COSSIE 1

do u put ordinary superunleaded and an octane booster aswell mate

Tony Turbo

Nope

andysrs

Most of the time i use good old 4 star as m8s dads garage still sells it but is a tad on the dear side £44 TO FILL MY S1

Combi_Chris

i use 99 ron fuel

addiction

Optimax all the way

Ad4m RST

why do you avoid optimax?

JamboRS

for example my mate had to run lees boost as his car was dettin on super unleaded,optimax cured this

RST_mark

can normal unleaded damage your engine? at 14psi? Cheers

ballin

iTrader: (1)

could do yes.

stop being cheap and put at the min SUL in.

optimax is best

Tony Turbo

Just personal preferance. My car was mapped on Esso SUL so that's what I run it on

Ad4m RST

oh ok lol, had me worried i only ever ran on optimax

didn't know you could map to a specific RON. Impressive

Gordon

My engine totally standard.
Been told that 2-1 is ok ( 2 unleaded to 1 super-unleaded )

???????????

opposite lock

iTrader: (3)

yeah ive found 99 ron. Try tesco,s . standard saff went and felt very strong with it

davie0146

optimax

olliehampton

check last months performance ford. they did dyno test on fuel. stay well away from spermarket fuel its crap. Big gains can be found from fuel.

Rallyesport

Only unleaded on S2. The head has hardened seats. Fifth gear did a test on different fuels. Optimax was best, giving most power on a WRX. This means the ECU sensed the quality of the fuel and adjusted the ignition. RST doesn't have a clever ECU but run Optimax since it's best.