Oil Additive: The Test Results
A head-to-head test of 1 oil additive options with the measured results for each. See how they ranked and watch the full test video.
Liqui Moly MOS2
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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 | Lubricity/friction test | RPM test (friction indicator) | Fuel efficiency test | Compression test |
|---|---|---|---|---|
| 1Liqui Moly MOS2 | compared against conventional 10W-30 oil on a lubricity tester (bearing wear after 30 seconds under load); described as too close to call and looking like a virtual tie, no measurable friction reduction observed | governor disconnected and throttle plate fixed so that any friction reduction would show up as an RPM increase; RPMs did not go up after adding the product. Per the meta chapters, which are not narrated aloud in the transcript, RPM was recorded in the 1820 to 1890 range | generator run under a 1500W load until the fuel ran out: 58 minutes flat before treatment, approximately 58 minutes after adding the product to the crankcase, no measurable improvement | per the meta chapters only, not narrated aloud in the available transcript: 105 PSI before treatment and 105 PSI after, no change |
How it was tested
- lubricity/bearing wear test versus conventional 10W-30 oil
- RPM test on a small engine with the governor disconnected, used as an indicator of reduced internal friction
- fuel efficiency test using a generator under a fixed load, run to empty before and after treatment
- compression test (before and after, per meta chapters only)
Data notes and caveats
Single-product myth/claims test of Liqui Moly MOS2 oil additive, not a head-to-head comparison, so isHeadToHead is false and there is no winner, runnerUp, or budgetPick. The compression-test PSI figures and the RPM range come only from the meta chapter titles (105 PSI before and after per chapters titled 'Compression test: 105 PSI' and 'Compression test results: 105 PSI (before 105 PSI)'; RPM 1820-1890 per chapter 'RPM: 1820-1890 range'); the available transcript text never narrates these specific numbers aloud, so they are included here as chapter-sourced data rather than spoken data.