ORIGINAL: TimBle
ORIGINAL: michel gravelle
Hi
I have a question .
If the compression ratio , is higher than say : 10: 1 or 11:1 , should we use a higher octane ?
Michel
Yes. Once you get above 10.8:1 then you need to be considering RON 98
Only &
IF the engine mfg recommends premium.
The vast majority of our gas engines we use for rc run fine on regular & don't require premium gas.
Jody &/or Ralph can probably tell ya which DO require premium, and won't have to take their socks off to count that high.
C/R and H.P. claims are more marketing/sales than actual fact.....along with bragging rights.