I have been running Royal Purple 10w30 in my 69 Mild 350 for 2 years now. I never had nor seen any problems running in it my car. I really like the stuff and think its a great oil def a lil improvement in power. I run it with a K&N oil filter as well.
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1969 CHEVELLE/ MALIBU
1966 MUSTANG K CODE CONVERTIBLE
2003 MONTE CARLO SS PACE CAR EDITION
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