Myth test1 productsFuel & Additives
Engine Carbon Cleaner: The Test Results
A head-to-head test of 1 engine carbon cleaner options with the measured results for each. See how they ranked and watch the full test video.
Ranked first
Antifreeze 50% water / ethylene glycol mix
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The measured results
Every number below is read straight from the test. Scroll sideways to see all measurements. Products are listed in the order they finished.
| Product | Spray mist test | Drip method test | Compression test | Oil contamination check |
|---|---|---|---|---|
| 1Antifreeze 50% water / ethylene glycol mix | did the spray mist actually help? I think it did. There's quite a bit of cleaning through the center part of the piston as well as around the intake valve | well, I'm really surprised at how well that worked. I did not expect the drip to work so much better than the spray mist | Compression test 105 PSI ... Compression test: 105 PSI (no change) | I don't see any visible contamination. In other words, it's not a milky white color |
How it was tested
- spray mist carbon cleaning test on a running, fully warmed engine
- drip method carbon cleaning test through the carburetor
- compression test before and after treatment
- visual oil contamination check
“Well, I'm really surprised at how well that worked. I did not expect the drip to work so much better than the spray mist.”
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