Wich ron fuel should i use

[ESDEEZ]

Considering that my car has a 17 year old a20 what grade fuel should I be using? And what efects would it have on wear,performance ect?

[smufguy]

I dont remember the conversion for Ron and the FCC Octane rating, but i think Octane # = (Ron +Mon)/2.

but anyway, run 87 Octane or equivalent fuel rating. i run 89 octane only cuz the price difference during a full tank fill up between 87 and 89 octane is only $1 (USD)

[ESDEEZ]

I dont remember the conversion for Ron and the FCC Octane rating, but i think Octane # = (Ron +Mon)/2.
but anyway, run 87 Octane or equivalent fuel rating. i run 89 octane only cuz the price difference during a full tank fill up between 87 and 89 octane is only $1 (USD)

err........ i dunno about the u.s but the lowest octane we can get here is 95! Super unleaded is 97-98!

[smufguy]

our Regular is 87 Octane, Silver/Medium is 89 OCtane and Premium/Gold is 91 (CA) and 93 (most other states). Since our car was listed to run on Regular grade fuel when it was sent to the US, we use 87 Octane. Some guys use different grades depending on the modifications done to their engine and some (like me, I run 89) run different grade because of the small price difference

[ESDEEZ]

97 is usally used in our car. then again regular is about 95 pence (uk money) wich is alot compared to you.