Rayzor said:
Minimum octane rating corresponds to the Anti
Knock Index AKI and is determined according
to the so-called (RON+MON)/2 method.
No no, we use RON here, AKI is US grading.
moranor@axis said:
If you dont go full throttle often you will gain little from higher octane...
It is more likely to knock at high ambient temps accelerating uphill, something every car does. Timing has an even bigger effect. Knock is not limited to full throttle.
abmi0000 said:
Best consumption on my 550i was with 95 + 3RON and car felt smooth. Our pump fuel is very inconsistant.
Your car has a 10:1 CR and a very well designed chamber and large squish area and little overlap on cams(bigger dynamic compression). I would bet money that it will dyno MORE from 93 than 95.
(VERY RELATIVE COMPARISON) F20C (honda S2000) runs 11.7 CR with low boost (0.4 iirc) perfectly on 95. In fact, I know an m10 engine in pta running 10:1 on 93, and it is not what I would call an effective cc design!