I purchased the oil and fuel treatments. My gas mileage went up and my vehicles drive smoother.
I'm using but the oil and fuel treatment in my 2005 F 250 diesel. It starts easier and my fuel mileage went up.
Fixed my hard start on my 6.0
I have a high mileage 5.9 cummins with some extra go go parts and with the oil additive it runs a little smoother and cleaner. Fuel additive also helped with my mpg.
Great products and will for ever use.
My 6.0 fires tight up no sluggish start and runs like a new truck!!!