roller rockers on my 360 . they say to use 10w 30 oil only I've always used royal purple XPR10-40 will I Damage the lifters using the 10-40 or will it be safe to use once the engine is broken in ?
Anybody using these lifters with oil heavier than 10w-30 ? okay I'l play find a photo this good enough?
Not making much power 554 TQ 505 hp , Think I'll sell the 360 and build something better
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