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Hi guys I’m just after a bit of advice regarding engine oil
I am running a pair of LS2 alloy block engines in my boat they have standard crank but forged pistons and rods with LS7 cams and cnc heads running approx 490-500hp on the engine dyno
what oil would people recommend as they can run at 4000+ rpm for extended lengths of time and obviously there is a lot of load on them I have been running them on miller oil’s css 10w/40 which is a semi synthetic here in the uk which was recommended to me but wondered what everyone’s thoughts were?
Im a fan of Mobil 1 0w/40 in my normal road cars but I don’t know if it would cut it in a marine environment
The Millars you are using will be fine, I have tested many well-known oil brands in customers marine applications from mild to wild and have found no bad oils as long a you have the correct grade which i believe you have you will be fine
As Ross said, you should be fine. What may be more important is the oil temperature and change hours.
Cheers for the reply’s I will stick to what I have oil gets changed every season so probably every 20-25 hours