Marvel
Mystery Oil
Historical Reference
This product is included for historical comparison and is not currently recommended for purchase.
Does not claim to be fuel stabilizer. Generator struggled to start, needed starting fluid, produced mystery smoke. Significant carbon buildup on spark plug. Plenty of corrosion on metal but looked better than Seafoam. Contains hydrotreated petroleum distillates, phosphoric acid, dichlorobenzenes. $14 for 32 ounces.
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After 5 Years, I Found The Only Fuel Stabilizer That Works!
Project Farm
Oct 05, 2025
Ranked #10
2.0
"Does not claim to be fuel stabilizer. Generator struggled to start, needed starting fluid, produced mystery smoke. Significant carbon buildup on spark plug. Plenty of corrosion on metal but looked better than Seafoam. Contains hydrotreated petroleum distillates, phosphoric acid, dichlorobenzenes. $14 for 32 ounces."