[QUOTE=gerryml;517058]For some reason, I got better mileage without loss in performance.QUOTE]
That's because our trucks are made to run on Regular gas (87 Octane). (Just look in the owners manual.) When you put anything of a higher Octane in these trucks the computer makes adjustments and does it's best to make the engine think it's running on Regular gas. And that's why it's a waste of money to put anything else but REGULAR gas in these trucks.
Johnnny