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What's the best engine oil for a flat tappet cam.

This is a discussion on What's the best engine oil for a flat tappet cam. within the Internal Engine forums, part of the LSx Technical Help Section category; I have several old school cars and I have heard that zinc and other additives have been removed from engine ...

  1. #1
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    pewter
    99 Trans Am

    Question What's the best engine oil for a flat tappet cam.

    I have several old school cars and I have heard that zinc and other additives have been removed from engine oils,All of the cars have less than 20,000 miles on them so I want a good oil that will keep them running for a long time.what oil have some of you found really makes a difference in none roller cam engines?

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    Pontiac Builds Excitement Silverbird01's Avatar
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    Sunset Orange Metallic
    2002 Pontiac TransAm WS6

    I have had great results using Shell Rotella 15w40 in my 67 Pontiac GTO with a 400ci. It's considered a HD diesel oil but does still have the minimum recommended additives that these engines need.

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    pewter
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    Quote Originally Posted by Silverbird01 View Post
    I have had great results using Shell Rotella 15w40 in my 67 Pontiac GTO with a 400ci. It's considered a HD diesel oil but does still have the minimum recommended additives that these engines need.
    That's the oil that I have been using in my cars and had never had a problem until this week,I have to replace the cam and lifters, I can't say that it came from using the Rotella because I rebuilt the engine about 13 years ago. I use it in all of my cars and not one problem until now.I feel that it was something I my not have done when breaking in the engine.I plan on staying with the Rotella until I hear of something better.I was a diesel mechanic until I retired 6 months ago,Rotella was what we used in all of our trucks big and small.thanks for the OK on this oil I was wondering if I was the only one using it.

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