The one thing not included in the above ^^^ stated article is regarding turbocharged vehicles. Despite the lower compression ratio, they need to use higher octane becuase of the forced air induction to reduce knock. Heat produced by turbochargers will cause 87 octane fuel to combust prematurely and therefore create that knocking sound.

maybe in germany octane is rated different?

Maybe. Our Regular is 91, Premium 95, Superpremium 98 and we get 100 too, but this is to expensive, and an rotary didn`t needs it.



Guenni

Damn you germans!! The highest I can get around here in chicago is 93-95.

it is. theres 2 ways to rate octane mon, and ron. one ends up being higher than the other, i forget which. japan and europe use the higher one, we average both ratings. so euro spec 95 is close to our 93...

will putting 87 or 93 damage my car at all? i am most likely going to put 87 in it because its cheaper and i hear rotaries like lower octane but now you guys go me thinking because i think the compression ratio in the s5 (89-91) rx-7's is higher. will that make a difference?

no the tuning on the fc is really consrvative. if you're running more timing or something than 92 can be worth a couple extra hp

i run 80 oct. mexi gas in my n/a..lol