About this product
One sealed 444 ml can of Berryman B-12 Chemtool Fuel Injector Cleaner — the product Berryman recommends for piston soak and aggressive fuel system cleaning. Ideal for:
- Single fuel tank treatment (~60 L gasoline)
- Testing B-12 on one cylinder before a full piston soak
- Small engines or topping up during extended soak
For a full 4-cylinder piston soak, we recommend the 3-pack (typically 2–3 bottles). Use the shop calculator for your exact engine.