Engine oil LIQUI MOLY or Castrol

LIQUI MOLY Engine oil
Big-Tubbz
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Rating 4.5

I always used LM 5w40 in my m62tu

Never had any issues and seemed to be a high quality brand

Pros: no issues, high quality
Vehicle: BMW
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LIQUI MOLY Engine oil

Brand doesn't matter as long as you keep up with the changes (every twelve months, given your driving), but Liqui Moly Leichtlauf gets good reviews.

Pros: gets good reviews
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Castrol Engine oil

I'm seeing a lot of strife around these comment parts on this post; but I will tell you this: If previous owner used only conventional, you best use conventional for the sake of the rubber seals on the block. If you want to eventually run synthetic after your first rebuild, be my guest, although I would recommend going the sohn adapter at that point, just for extra insurance that what you're doing is good for the engine.

I don't know where you're located, but I've personally ran Castrol GTX oil in all my cars up until now; the only thing is, it's harder and harder to find conventional oil that is of thinner grades. Which isn't a bad thing, because the RX8 needs thicker oil than what's on the oil cap anyway! 5w-30 should be your minimum thickness, but really, it's recommended you go thicker, to like 10w-40 for year-round, and 20w-50 for track days or extremely hot climates. There's this shell oil for diesel that's rated at 15w-40 that I was going to potentially pick up and start using. Yeah your fuel economy is gonna drop a tad, but you're really doing it for the sake of your bearings.

P.S. get an oil catch can that vents to atmosphere if legal in your area. It will save you heaps of headaches down the road ????

Pros: good for bearings, thicker oil recommended
Cons: fuel economy drops
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