Engine oil Mobil or VALVOLINE

Mobil Engine oil

M1 ESP is arguably the best oil out there. It does not shear fast, doesnt degrade with 5% fuel dilution.

Pros: does not shear fast
Cons: degrades with fuel dilution
Vehicle: Audi S4
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Mobil Engine oil

Mobil1 is $25 a jug at the Walmart, my Blackstone Labs reports say it would be fine if I wanted to extend it well beyond the factory 6k interval.

Pros: extend beyond factory interval
Vehicle: Subaru
Mileage: 114000 km
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Mobil Engine oil
m8ishere1
  • Engine noise:
  • Exhaust smoke:
Rating 5.0

I noticed a massive difference switching from 0w-30 to Mobil 1 FS 5w-40 in my NG 93. Engine sounded better, burned WAY less oil, and no noticeable fuel economy or power difference. I also used Ceratec a few times and that made it feel smoother.

Pros: engine sounded better, less oil burned
Vehicle: Saab
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Mobil Engine oil
Dean-KS
  • Engine noise:
Rating 4.0

Ran quieter on 5-40 heavy duty diesel Mobil 1

Felt more powerful, but that may have been a perception from quieter and smoother power. Others on Saabnet reported the same.

Pros: quieter, smoother power
Vehicle: Saab 900
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Mobil Engine oil

Mobil 1. Used to be a valvoline guy but my motor blew up lol. Dont think brand had anything to do with it, just felt like shaking things up.

Cons: motor blew up
Vehicle: Toyota Echo
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