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Spare parts reviews ➔ All comparisons ➔ OEM Mazda ➔ Motorex

Engine oil OEM Mazda or Motorex

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OEM Mazda
Motorex
OEM Mazda › Engine oil
LVMom
  • Exhaust smoke:
Rating 4.0

No, but I did keep 2 quarts of oil and a gallon jug of water. My Mazda Protege was notorious for burning oil and overheating

Pros: kept oil and water
Cons: burning oil, overheating
Vehicle: Mazda Protege
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Motorex › Engine oil
rat_trap69
Rating 5.0

At the end of the day, pretty much anything in spec will work fine.

That being said, I did a bunch of research for my V85 and determined that Motorex Cross-Power does the best in high demand applications. Air cooled engines can have a really wide temp range. That's what I use.

Pros: best in high demand
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OEM Mazda › Engine oil
acejavelin69
Rating 5.0

Change the oil at a minimum, and do it regularly. Use a quality synthetic high mileage oil and change it again in a couple thousand miles, then change on regular 5k mile intervals.

Pros: quality synthetic oil
Vehicle: Mazda 6
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OEM Mazda › Engine oil
Gambit3le
Rating 5.0

I have run 0w20 in my 2013 Mazda 3 skyactiv for 244,000 miles. It doesn't burn or leak any oil between changes. I change the oil and filters every 5-6,000 miles.

Pros: no burning or leaking
Vehicle: Mazda 3
Mileage: 244000 km
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OEM Mazda › Engine oil
Contalyst
Rating 5.0

I personally am changing my own oil with full synthetic on my 23 2.5T every 6000 km or so. No need other than peace of mind for me. Doing it myself only takes 30 minutes and $35 in oil, filter and crush washer.

Pros: peace of mind
Vehicle: Mazda 3
Mileage: 6000 km
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OEM Mazda › Engine oil
AutoModerator
Rating 5.0

For [Naturally-Aspirated Skyactiv engines](https://en.wikipedia.org/wiki/SkyActiv), it is highly recommended that you use Mazda's own(Idemitsu) high molly GF-5 0w-20. [Arguably it is one of the best oil for skyactiv engines](http://www.cleanmpg.com/community/index.php?threads/45295/#post-357910).

Pros: best oil for skyactiv
Vehicle: Mazda 3
Part number: GF-5 0W-20
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Motorex › Engine oil
No_Question_8083
Rating 3.0

It takes a “synthetic blend” of motorex 15W50 oil. And uhh yeah works good I guess, don’t have to change it too often, and as far as performance goes, it doesn’t really matter because I’m on restricted power anyways so yeah ????‍♂️

Pros: works good
Cons: restricted power
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Which engine oil to choose — OEM Mazda or Motorex?

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 OEM Mazda and Motorex
  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 — Motorex or OEM Mazda?

In March 2026 on PartReview, engine oil OEM Mazda were overall better than Motorex.

  1. OEM Mazda received a PR Score of 85 out of 100, and Motorex scored 84 points.
  2. OEM Mazda ranked 18 in the overall ranking, and Motorex ranked 27.
  3. The average rating is higher for Motorex (4.3) than for OEM Mazda (4.2).
  4. Engine oil Motorex have better feature ratings than OEM Mazda:
    • Engine noise - owners believe, that by this property OEM Mazda does not differ from Motorex.
    • Exhaust smoke - drivers claim, that this property for OEM Mazda is outperforms Motorex.

Which engine oil are more popular — OEM Mazda or Motorex?

In March 2026 on PartReview, engine oil OEM Mazda were overall more popular than Motorex.

By vote balance, engine oil OEM Mazda surpassed Motorex:

  • For OEM Mazda, the ratio of positive (83) to negative (14) votes is 69 votes.
  • For Motorex, the ratio of positive (44) to negative (8) votes is 36 votes.

By number of reviews, engine oil OEM Mazda surpassed Motorex:

Which engine oil do car owners prefer — OEM Mazda or Motorex?

In March 2026, according to PartReview, engine oil OEM Mazda led more car-specific ratings than Motorex:

OEM Mazda are chosen by owners of cars such as: Mazda 3, and others.

Engine oil Motorex have not yet taken leading positions in car-specific ratings. You can help by adding a review and specifying your car.

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 OEM Mazda with: Mobil, Castrol, LIQUI MOLY, MOTUL, Shell, AMSOIL, VALVOLINE, PENNZOIL, RED LINE, OEM Toyota.

Also available: comparisons of engine oil Motorex 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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