I've always been a Castrol man for my BMW car.
Pros: reliable performance
Vehicle:
BMW
Owner reviews for engine oil
4218
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I use Mobil 1 in my RT and it's been good.
Pros: good performance
Well I decided to try Motorex on my F800 GS, bought the 4T Top Speed full synthetic, in 15W50, boy I cant help it but recommend this oil, the gearbox is so smooth and silky.
Pros: smooth and silky gearbox
Vehicle:
BMW
I've run penzoil ultra platinum 5w30 for the last two oil changes. It's great, but running the heavier grade oil I notice the engine is a little sluggish until it's been running for something like 10 minutes, so my next oil change im gonna go back to 0w20 and stick with penzoil ultra platinum because it seems to run cleaner than the valvoline oil I ran before.
Pros: runs cleaner
Cons: engine a little sluggish
I normally use Mobil 1, but did experiment with a JDM brand called ENEOS. The engine seemed to run smoother with that engine than other brands I've tried before.
Pros: engine ran smoother
I would say 0w20 Motul 8100 is a solid choice.
Pros: solid choice
I use Motul's 0w-20 "Eco-lite" and change about every 4-5 (or April-October really) with about 25 autocrosses and the highway driving to get to them.
I use Motul 300v 0w20, plus oil analysis from Blackstone Labs, currently every 6k miles until they tell me otherwise
Mileage: 9656 km
Mobil 1 0W20 every 2.5k miles.
Mileage: 4023 km
From my personal experience, I used to use Mobil 1 and Pennzoil Ultra Platinum oils, which are really high-quality oils. However, I did notice a big difference when I began using the OEM Mazda oil. I don't know what is so different about it, but my engine runs much more smoothly and very quietly. When I am at a stop light, I don't even feel the engine running, it's gotten that quiet, and I just hit over 100k miles.
Pros: engine runs smoothly, very quietly
Vehicle:
Mazda
Mileage: 160934 km
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