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Spare parts reviews ➔ All comparisons ➔ Eneos ➔ IDEMITSU

Engine oil Eneos or IDEMITSU

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Eneos
IDEMITSU
IDEMITSU › Engine oil
Possible-Aerie-8828
  • Engine noise:
Rating 5.0

I buy 5 OE Toyota filters at a time from Amazon ( approximately $6 ea ) Purchase Ow-20 Idemitsu oil from NAPA ( ships free to my home ) in the cost saving 6gal box ( 24 qts ) for about $125 with their online coupon. Use this in both my Avalon and my Tundra- both run like a dream.

Pros: cars run like a dream, cost-saving
Vehicle: Toyota Avalon
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IDEMITSU › Engine oil
random-guy1947
Rating 4.0

This is normal. Wait till it gets below 1k rpm. Modern engines do not need a lot of time to idle after cold start, the ECU handles it. Although, for a few kilometres, do not push very hard. The engine oil (0w-20 idemitsu) is thin, and needs time to lubricate well.

Pros: thin, needs to lubricate
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IDEMITSU › Engine oil
NefariousN1nja
Rating 5.0

Switch to Idemitsu ( Japanese oil ) - Manufacturers for genuine and even does factory fill for many, they are very premium oils with starting segment already beating the top shelf of alternative brands.

Pros: premium oils, beating alternative brands
Vehicle: Toyota
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IDEMITSU › Engine oil
steptimeeditor
Rating 5.0

Idemitsu is responsible for the oil that powered the Mazda 787b; they know the rotary like no other. I exclusively use their synthetic 20w50 and premix.

Pros: knows rotary like no other
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IDEMITSU › Engine oil
ExtraGlutenPlzz
Rating 3.0

So if you review the virgin oil analysis database, it includes idemitsu 0w-20 and 5w-30 and for both, the TBN is rather weak in comparison to other more readily available blends, also, the viscosity at 9.5 cSt for a 30w, some 20w come close to that. Does any of that matter? Not a whole lot, but it shows that there's nothing special about the oil. Generally speaking, higher TBN is better.

Pros: nothing special about oil
Cons: TBN is rather weak
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Which engine oil to choose — Eneos or IDEMITSU?

If choosing engine oil across many manufacturers, check the part ranking. If your choice is down to two brands, the PartReview part comparisons help.

We compare engine oil across these categories:

Comparison of engine oil Eneos and IDEMITSU
  1. PR Score.
  2. Overall ranking.
  3. Vote balance.
  4. Average rating.
  5. Number of reviews.
  6. Feature ratings.
  7. Car owners’ choice.

Which engine oil are better — IDEMITSU or Eneos?

In March 2026 on PartReview, engine oil IDEMITSU were overall better than Eneos.

  1. Eneos received a PR Score of 97 out of 100, and IDEMITSU scored 97 points.
  2. Eneos ranked 16 in the overall ranking, and IDEMITSU ranked 14.
  3. The average rating is higher for IDEMITSU (4.8) than for IDEMITSU (4.8).

Which engine oil are more popular — Eneos or IDEMITSU?

In March 2026 on PartReview, engine oil IDEMITSU were overall more popular than Eneos.

By vote balance, engine oil IDEMITSU surpassed Eneos:

  • For Eneos, the ratio of positive (77) to negative (2) votes is 75 votes.
  • For IDEMITSU, the ratio of positive (83) to negative (2) votes is 81 vote.

By number of reviews, engine oil IDEMITSU surpassed Eneos:

Which engine oil do car owners prefer — Eneos or IDEMITSU?

In March 2026, according to PartReview, engine oil Eneos and IDEMITSU have not taken top places in car-specific ratings. You can help by adding your review about these manufacturers.

Other comparisons of engine oil

If this comparison didn’t fully answer your question, there are many others on PartReview.

For example, comparisons of engine oil Eneos with: Mobil, Castrol, LIQUI MOLY, MOTUL, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota.

Also available: comparisons of engine oil IDEMITSU with: Mobil, Castrol, LIQUI MOLY, MOTUL, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota.

You can also see who is better among other engine oil manufacturers: Mobil or Castrol, Mobil or LIQUI MOLY, Mobil or MOTUL, Mobil or Shell, LIQUI MOLY or Castrol.

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