Engine oil Shell or OEM Mazda

OEM Mazda Engine oil

For Naturally-Aspirated Skyactiv engines, 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.

Pros: highly recommended, best oil, high molly
Vehicle: Mazda 3
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Shell Engine oil

Can’t go wrong with Rotella T6. It’s marketed as a diesel engine oil, but gas engines love the stuff too. It’s just not great for catalytic converters, because it contains a high amount of anti-wear and anti-friction additives.

Pros: gas engines love it
Cons: bad for catalytic converters
Vehicle: BMW
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Shell Engine oil

Oil consumption was the biggest issue when running 5w30. Changed to a 5w40, 10w30, and then got recommend 15w40 and oil consumption stopped

Pros: stopped oil consumption
Vehicle: Subaru
Mileage: 363000 km
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Shell Engine oil

I’ve been using T6 for 8 years now and it still lubricates the car. The car burns oil though so it’s always getting fresh stuff.

Pros: still lubricates the car
Cons: car burns oil
Vehicle: Subaru
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Shell Engine oil
rickjaguar
  • Engine noise:
Rating 1.5

I did use the Shell T6 Rotella 5W40 for 4 OCI's and then got a misfire issue. When my mechanic was going thru the possible symptoms he asked what oil i used. When i told him it's a full synthetic deisel truck oil he shook his head and said that not a good idea. Too thick, and that could have an impact.

Cons: caused misfire issue, too thick for engine
Part number: T6 ROTELLA 5W40
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