In my 2015 JGC SRT 6.4 hemi I use Penrite 10 Tenths 0w40 syn no slump oil ,basically a race oil.Plus Penrite rep alsosaid put in their zinc additive as well.He said major problem in the last few years is the Govt mandatedlowering of available zinc they can put in oil to combat wear.
Last edited by bjm; 25-05-2022 at 02:03 PM.
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