Berryman Total Engine Tune-Up (Part #0316) is a combination gas-diesel product that cleans carburetors, all types of injectors, and intake valves (in non-GDI engines); cleans disperses sludge in the crankcase; disperses moisture in fuel and oil; restores lubricity for longer equipment life and better fuel economy; and stabilizes both gas and diesel fuels. Berryman B-12 Fuel Injector Cleaner (Part #0116) is our flagship fuel additive, great for everyday usage for cleaning fuel injectors and intake valves.  We recommend using 0116 every third fill up.