Evaluation of hydrogen and oxygen mixture addition in internal combustion engines under real driving conditions
František Synák · 2026
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Description
František Synák tests a popular add-on that feeds hydrogen and oxygen gas into car engines, in a 2026 study. Sellers of these HHO kits promise more power, lower fuel use, and cleaner exhaust. Hard proof under real driving has been thin, so Synák set up a careful road test.
Three vehicles took part. Two were twins run for 67,000 kilometers under the same conditions, and only one carried the gas kit. That long twin run strips out most outside noise. The kit brought no measurable gain in power or torque, the study found. Exhaust makeup shifted only slightly. Synák concludes the real gains fall far short of sales claims, a useful check for drivers weighing greener upgrades.
Catalog record
| CREATOR | František Synák |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 62 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |