What's the best octane to use?

Has zippo to do with being cheap. It is called not pissing away your money needlessly. :D
Certainly does. Want peak performance, efficiency, longevity and the least amount of carbon buildup...? RUN PREMIUM!
 
Let's compromise:

For maximum performance the best octane is 91 or higher. One can get an extra 2% hp at the crank under hard acceleration which equates to nothing measurable as far as time on a 0-60 run.

For maximum pocketbook impact, the best octane is regular (87 octane at sea level) for a 20% savings to the pocketbook.

If 87 Octane isn't enough to prevent knock, the ECU immediately detect it and will retard timing to eliminate the knock and the car will continue running as designed. The owner will maintain their factory warranty and everybody is happy. Those that absolutely need that extra approximately 7 hp can feed their power addiction and those that don't can have more beer money.

As for me an my house, we will have both: maximum hp/tq through my tune + premium fuel and as much beer as I like because I can.
 
Certainly does. Want peak performance, efficiency, longevity and the least amount of carbon buildup...? RUN PREMIUM!

Premium fuel only has more octane which is a knock retardant, it has nothing to do with carbon build-up. The amount of cleaning additives minimizes carbon build-up, and that can be found in Top Tier fuel of any octane rating.
 
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Certainly does. Want peak performance, efficiency, longevity and the least amount of carbon buildup...? RUN PREMIUM!

The ECU through timing adjustments maximizes efficiency regardless of the octane rating of the fuel, hence the reason I and others have no mathematically discernible difference in fuel economy when we run premium or when we run regular.
 
The higher the octane, the cleaner and more completely your fuel burns...so how exactly does that not affect efficiency, power and cleanliness? I'll wait.
 
From interior to exterior to high performance - everything you need for your Stinger awaits you...
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