Originally posted by durateX: My baby will be reaching 70k pretty soon, and I am already thinking about the oil I will switch to. At the moment, I am using Castrol 20W/50, and I am happy with it. I don't think I am making the jump to synthetic because of some implications, but wold like to know if I will need to increase my viscosity or is 20W/50 just fine to continue to use?
XL
20W/50 
Me and the owners manual recomend 5W/30...
Cameron
98 Black CSVT #2958
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