Fuel Additive: The Test Results
A head-to-head test of 1 fuel additive options with the measured results for each. See how they ranked and watch the full test video.
Some figures on this page were transcribed from the test video and have not been independently re-verified. Treat the numbers as a close guide and watch the full video for the exact readings.
Seafoam
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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 | Fuel Tank Hot Water Flush | Seafoam Concentration Used | Hot Soak Duration | Cylinder Head Temp | Smoke After Treatment |
|---|---|---|---|---|---|
| 1Seafoam | narrator states I feel pretty confident I got the sugar out of the gas tank and the fuel filter, followed by compressed air to blow the system out | roughly 1 oz of seafoam per 20 oz of fuel added to the tank, about 5 times the label recommended dose of 1 oz per gallon, plus a separate 8 oz seafoam IV drip metered into the intake and about half an ounce added to the oil before an oil change | 20 to 30 minutes | meta chapter titled Cylinder Head Temp: 255F, never spoken or explained in the transcript audio | meta chapter titled Engine no longer creating smoke, never confirmed in the transcript audio |
How it was tested
- hot water flush of the fuel tank and fuel filter to dissolve residual sugar
- seafoam added to fresh fuel and run through the carburetor
- seafoam IV drip metered into the intake for a 20 to 30 minute hot soak
- seafoam added to the engine oil before an oil change
- combustion chamber inspection after treatment
Data notes and caveats
Follow up to an earlier video in which sugar was added to a small engine's fuel tank to test the myth that sugar destroys an engine; this video is the cleanup attempt, not a new destructive test. Only one product (Seafoam) is used, alongside a hot water flush, so this is not a brand comparison. The video explicitly ends unresolved: the narrator states I could have used other products but I did what you guys recommended, then directly asks viewers do you think seafoam and water did a good job cleaning up the sugar contamination, do you think there was something else that would have worked better, rather than declaring his own verdict, so winner is null rather than forced. Meta chapters reference a Cylinder Head Temp: 255F reading and an Engine no longer creating smoke milestone that would normally indicate the treatment's effectiveness, but neither figure nor confirmation is ever spoken in the transcript audio, so chapterMap is false and confidence is low pending video frame recovery. Logged to data/onscreen-only.txt. This appears to be part of the same recurring Project Farm seafoam/destructive-testing franchise as other videos already logged there (2ySSEzqEa_k, wT0TTGO2CUY).
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