99svtvert
New Member
I have used the search function and read for an hour. So much difference of opinion on this one. I guess the real crucial time is the first 40-100 miles but 1500 also seems to be a milestone. I have 2400 miles on the new built Cobra Engine. Is it time to go synthetic ?
Best Synthetic. I have used Royal Purple for 2 years but German Castrol gets lots of "good press" in the search function with high RPM engines.
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Best Synthetic. I have used Royal Purple for 2 years but German Castrol gets lots of "good press" in the search function with high RPM engines.
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