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Motor oil

How Bad Are Cheap "Diesel" Motor Oils? $14 vs $58

Jun 2024 · 13 min · 6 products tested

The two AI readings did not agree on his winner, so none is shown here. His verdict is in the video.

Watch on YouTube

Results, round by round

Flow speed at 70° F

Lower is better, in s5 of 6 products have agreed numbers, so no leader is marked
  1. 1Hot Shot’s2.46sAmazon
  2. 2Royal Purple2.98sAmazon
  3. 3Mobil Delvac3.03sAmazon
  4. 4Rotella T63.08sAmazon
  5. 5Schaeffer’s3.13sAmazon

Evaporative loss

Lower is better, in g
  1. 1Amsoil4.14gNo link
  2. 2Royal Purple5.25gAmazon
  3. 3Hot Shot’s5.52gAmazon
  4. 4Schaeffer’s6.23gAmazon
  5. 5Rotella T66.64gAmazon
  6. 6Mobil Delvac6.75gAmazon

Wear scar

Lower is better, in mm
  1. 1Amsoil5.22mmNo link
  2. 2Schaeffer’s5.27mmAmazon
  3. 3Hot Shot’s5.51mmAmazon
  4. 4Royal Purple5.6mmAmazon
  5. 5Rotella T65.63mmAmazon
  6. 6Mobil Delvac5.94mmAmazon

Everything he tested

Results were read from the video's captions by two AI models, and only the numbers both agree on and that he says out loud are shown. Some results appear only on screen in the video. Check the video before you buy.