i was getting about 17 mpg on average with my 110k mi. mustang 5.0 before i added the auto-rx cleaner to my oil. i just refilled on gas and checked the gas mileage again and it was at 21 mpg and that was driving around town! this is truely a great probuct that everyone should try and see the awesome results first hand! it will save you tons on gas especially with the rices prices.
-Ross
-Ross