What grade gas you running in 3.0's

[DINANM3]

Originally Posted by JCL

DinanM3, you seem to be confusing RON with pump octane. The poster who asked the question is in Geneva. 100 RON in Geneva is very close in anti-knock properties to 93 pump octane in North America. Your 100 octane fuel in a road vehicle doesn't make a lot of sense, as the engine was not designed for it.

The M5 and M3 i put them in were modified not stock. The M3 was superharged. And beleive me it made a difference.
I was just saying that 100 ocatane in a stock 4.8 wont hurt it. Not sure if it will help it.

[JCL]

Originally Posted by DINANM3

The M5 and M3 i put them in were modified not stock. The M3 was superharged. And beleive me it made a difference.
I was just saying that 100 ocatane in a stock 4.8 wont hurt it. Not sure if it will help it.

DINANM3: Thanks for that. Yes, with those modifications I am sure you can use all the knock resistance you can find. My comment was that we should keep clear what the figure 100 means. Your 100 pump octane isn't the same as 100 RON.

Jeff