Quote:
Originally Posted by BCT748  And lower octane fuels run the risk of detonation in higher compression motors that can cause severe damage, what's your point?
I'll take dirty valves over blowing my motor. |
All depends on the motor, and what you consider 'higher compression'. Modern head and piston design is MUCH better than what it used to be, so while in the past anything over 9:1 would demand high test to run without pinging, you can build a 12.5:1 motor that'll purr on 87 octane fuel now. So, if you want the best performance, run the lowest octane you can that doesn't ping, simple as that.