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Berryman B-12
Chemtool Fuel System Cleaner

Professional-grade fuel injector cleaner. Cleans entire fuel system — gas tank, intake valves, fuel pump & carburetor.

444 ml per bottle
High-energy solvent formula
EU-wide delivery
Fast shipping

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How Many Bottles Does Your Car Need?

Select your vehicle to get a personalized Berryman B-12 dosage recommendation for the piston soak procedure.

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🔧 Pro Technique

The Piston Soak Method

One of the most effective ways to restore engine performance is the piston soak procedure using Berryman B-12 Chemtool. Pour a small amount directly into each cylinder through the spark plug hole, let it soak for 8–12 hours (or overnight), then crank the engine to expel the loosened carbon deposits. The result: dramatically cleaner pistons, restored compression, smoother idle, and improved fuel economy — without disassembling the engine.

1Remove spark plugs
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2Pour B-12 into cylinders
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3Soak 8–12 hours
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4Crank & reinstall
Piston soak demo
▶ Watch on YouTube
Piston Soak Procedure — Full Walkthrough
Step-by-step engine carbon cleaning
B-12 Chemtool review
▶ Watch on YouTube
B-12 Chemtool Before & After Results
Real engine performance comparison
Overnight soak
▶ Watch on YouTube
Overnight Cylinder Soak — Does It Work?
Stuck rings and carbon buildup removal
Engine cleaning tips
▶ Watch on YouTube
Full Fuel System Cleaning Tips & Tricks
Maximize results with B-12 Chemtool

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