The best replacement for 10w40 is 5w30.

The best alternatives to 10w40 are rated as following:
★★★★★  5w30
★★★★★  10w30
★★★★  20w50
★★★★  15w40
★★★  5w40
★★★  10w50
★★★  5w20
★★★  15w50
★★  20w40
★★  20w50 motorcycle oil
★  0w40
★  5w40 oil
★  10w60
★  10w30 motorcycle
  10w30 oil
  5w50
  sae30
  10w30 thicker
  sae 40
  sae 30
  10w30 viscosity
  20w50 oil

Your alternative for 10w40 is not listed? Suggest!
Speaking about 10w40, one probably shouldn't forget about 5w30.

Other search terms related to 10w40 and their ratings are:
★★★★★ 5w30
★★★★★ 20w50
★★★★★ 10w30
★★★★ 15w40
★★ 5w40
You have in mind a companion for 10w40 and it is not yet here? Propose!



Google Trends

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10w40
5w30
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