Originally Posted by Don Hiltz
I know I'm going to engender a firestorm, but here goes anyway........
I always used 93 octane until I spoke with an automotive engineer who told me that owners are wasting their money by putting too high an octane in their tanks. Further, he explained that if the engine did not knock or diesel and if the power and mileage didn't suffer, always go with the lowest octane.
About 18 months ago, I lowered to 89 with no change in any of the parameters he described. About a year ago, I dropped again to 87 with the same result: no change.
I'm waiting for the rebuttals...........
Don