Castrol Racing oil 10W/60

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131
Location
Sydney
My father used Castrol R 10W - 60 for years in his 1993 HSV Clubsport 5.0L. He found the oil made the car feel a bit sluggish so recently, he changed to Castrol R 0W - 40 and he believes the car runs much better. He doesn't drive the car hard so there should be no issue No doubt the 10W - 60 is a premium oil though, just relatively high viscosity.
 
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2,480
Good? Oh, yeah... I've been using it for the past 10k mi. (2 intervals) in my 1994 BMW. The car has never run better. I haven't done an analysis yet because I'm waiting for the crap to be slowly flushed out from years of 5-30 use...but, I will do one eventually - once I feel safe to complete 10k on a single interval. Will also be intersting to see how it does this winter...
 
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