Motor Oil Jul 2019 Test: Which Brand Wins?
This Jul 2019 head-to-head test of 2 motor oil options has the measured results for each. See how they ranked and watch the full test video.
Mobil 1 Extended Performance
Price shown in test: $9.47 per quart
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The measured results
Every number below is read straight from the test. Products are listed in the order they finished.
All measurements (11 more)+
Flash point
- 1Mobil 1 Extended Performance392 F
- 2Mobil 1 Jet Oilover246 C
(475 F)
Viscosity
- 1Mobil 1 Extended Performance57.2
cSt at 40 C, 10.2 cSt at 100 C
- 2Mobil 1 Jet Oil27.6
cSt at 40 C, 5.1 cSt at 100 C
Pour point
- 1Mobil 1 Extended Performance
-42 C (-44 F)
- 2Mobil 1 Jet Oil
-74 F
Lubricity test wear scar
- 1Mobil 1 Extended Performance6.01 mm
smaller and better than the jet oil's 6.29 mm scar; this figure comes only from a video chapter title, it is not spoken aloud in the narration
- 2Mobil 1 Jet Oil6.29 mm
larger and worse than the motor oil's 6.01 mm scar; this figure comes only from a video chapter title, it is not spoken aloud in the narration
Cold flow test, first run (24 hours at -15 F)
- 1Mobil 1 Extended Performance
beaten by the jet oil by over 8 inches
- 2Mobil 1 Jet Oil
beat the motor oil by over 8 inches, described as unfazed by the cold
Evaporative heat loss test (about 375 to 400 F for 2 hours)
- 1Mobil 1 Extended Performance
lost about 2 g of weight, starting weight 407 g, ending weight 405 g
- 2Mobil 1 Jet Oil
lost only 0.52 g of weight, starting weight 416.92 g, ending weight 416.4 g, and stayed visibly clear
Cold flow retest, new vs heat-exposed oil
- 1Mobil 1 Extended Performance
the uncooked (new) motor oil beat the cooked (heat-exposed) motor oil by around half an inch, but the uncooked motor oil was still beaten by the uncooked jet oil by over 8 inches
- 2Mobil 1 Jet Oil
the new (uncooked) jet oil beat the heat-exposed (cooked) jet oil by less than an inch, and beat the uncooked motor oil by over 8 inches
Guaranteed protection interval
- 1Mobil 1 Extended Performance15,000
mi
- 2Mobil 1 Jet Oilnot tested
Certifications
- 1Mobil 1 Extended Performance
Dexos 1, API SN Plus
- 2Mobil 1 Jet Oilnot tested
Mobil 1 star rating
- 1Mobil 1 Extended Performance
two stars for preventing breakdown and extending life, protecting against engine wear, and combating sludge and deposits; three stars for protecting in high engine temperatures
- 2Mobil 1 Jet Oilnot tested
Shelf life
- 2Mobil 1 Jet Oil10 years
manufactured March 2018, good until March 2028
- 1Mobil 1 Extended Performancenot tested
How it was tested
- safety data sheet comparison: flash point, viscosity, pour point
- lubricity/wear test measuring bearing scar size
- cold temperature oil flow test after 24 hours at -15 F
- evaporative heat loss test, about 375 to 400 F for 2 hours (Noack-style)
- cold flow retest comparing new oil to heat-exposed (cooked) oil
Data notes and caveats
Framed explicitly as a fun, not-for-real-use comparison; the reviewer repeatedly warns viewers not to use jet oil in a vehicle engine. No single overall winner is declared: the closing summary gives a clean per-test split verdict instead ('it did very good on the lubricity test, beating the jet oil, but that's where the motor oil ended its superior performance... the jet oil did very good in the evaporative test... the cold oil flow test was very impressive as well, totally dominated the competition'). Motor oil wins the lubricity/wear test; jet oil wins the cold flow test and the evaporative heat loss test. The lubricity wear-scar numbers (6.01 mm for Mobil 1 motor oil, 6.29 mm for jet oil) exist only in the video's chapter titles and are never spoken aloud in the transcript narration.
