"Fritz Wagner" > wrote in message
...
>
> So when my Owner's Manual calls for 90 AKI fuel, it is asking for
> 93 RON (+/-). Seems an 89 AKI would not involve much risk
> at all and it would save 10% on fuel price versus 93 AKI (premium).
> Any risks here other than loss of power and mileage? Not
> worth wrecking the engine to save on fuel expense!
>
> Fritz Wagner

The difference is usually 10 cents per gallon or about 5%, at least in
these parts (Northeast USA). Also, many of the gas companies now have
93 AKI as you noted, so for that 5% increase you do get a significant
increase in octane. That said, if you don't *need* the increased
octane, it will be money wasted. Best bet is to run a few tanks of
each fuel and carefully log conmsumption and performance then decide.

-Fred W