Which Two-stroke Engine Oil Brand Wins?
This head-to-head test of 3 two-stroke engine oil options has 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.
2-stroke oil (Echo brand)
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The measured results
Every number below is read straight from the test. Products are listed in the order they finished.
Gasoline mixing test
- 12-stroke oil (Echo brand)
does not mix well with gasoline unless stirred, demonstrated by leaving it unstirred first; blends with gasoline very easily once stirred
- 24-stroke oil, conventional (10W-30)
color is very close to gasoline, making visual separation hard to judge; some settled to the bottom on first look; after a couple hours it appeared to have mixed within the gasoline
- 34-stroke oil, full synthetic (Mobil 1)
like the 2-stroke oil, did not mix with gasoline on its own and required stirring
All measurements (5 more)+
Engine baseline
- 12-stroke oil (Echo brand)
used at a 16:1 gas to oil ratio during engine break-in in a small 2-stroke Briggs and Stratton engine (originally from a snowblower, remounted on an old pressure washer frame); cylinder inspected with a borescope before testing as the reference point
- 24-stroke oil, conventional (10W-30)not tested
- 34-stroke oil, full synthetic (Mobil 1)not tested
24 hour premix separation check
- 24-stroke oil, conventional (10W-30)
no separation taking place after 24 hours; narrator's own research suggests 4-stroke oil premixed with gas can gum up over time, and cautions this is only a 24 hour snapshot that might look different after a couple of months. The transcript literally says 'the two-stroke oil has remained mixed' at this point, despite the surrounding context being about the 4-stroke premix; kept verbatim, likely a mislabeled oil type rather than a genuine two-stroke result
- 12-stroke oil (Echo brand)not tested
- 34-stroke oil, full synthetic (Mobil 1)not tested
Engine run test (2-stroke engine, 1 oz oil per 32 oz gasoline)
- 24-stroke oil, conventional (10W-30)
cylinder cap after use shows a little bit of carbon buildup, spark plug also has a little bit of carbon buildup, described as all in all not too bad. Run duration is stated inconsistently in the transcript, first as 'a solid hour' and 'about an hour' at introduction, then as 'after several hours of use' when describing the cylinder cap findings; kept both, not resolved
- 12-stroke oil (Echo brand)not tested
- 34-stroke oil, full synthetic (Mobil 1)not tested
Overall side effects
- 24-stroke oil, conventional (10W-30)
narrator concludes there did not seem to be any side effects from using 4-stroke oil in the 2-stroke engine in this short-term test, no unusual cylinder wall scoring or engine overheating observed
- 12-stroke oil (Echo brand)not tested
- 34-stroke oil, full synthetic (Mobil 1)not tested
Engine temperature/burn cleanliness
- 34-stroke oil, full synthetic (Mobil 1)
meta chapter titles state 'Synthethic 2-stroke oil burns clean' and 'Engine temp nearly the same as 2-stroke', suggesting the synthetic 4-stroke oil burned cleanly and ran at a similar engine temperature to the 2-stroke baseline, but no actual spoken temperature figures or PSI readings appear anywhere in the transcript despite the video description explicitly promising compression testing and measured engine temperature
- 12-stroke oil (Echo brand)not tested
- 24-stroke oil, conventional (10W-30)not tested
How it was tested
- gasoline mixing test: 2-stroke oil, 4-stroke conventional oil, and 4-stroke full synthetic oil each mixed with gasoline in jars, observed stirred vs unstirred and after several hours
- 24 hour premix separation check for 4-stroke oil pre-mixed with gasoline
- engine break-in and run test in a small 2-stroke Briggs and Stratton engine, comparing the 2-stroke oil baseline against 4-stroke oil premix, with borescope/cylinder cap inspection for carbon buildup
- compression testing and engine temperature measurement (promised in the video description; no PSI or degree figures are actually spoken anywhere in the transcript)
