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Opinions/experience with Royal Purple or Red Line oils/lubes/ATF?

3441 Views 15 Replies 8 Participants Last post by  bradelee
Just wondering if anyone has used Royal Purple or Red Line in their motors or tranny? Suppose to increase efficiency and decrease gear noise, but I want to make sure it's not more hype than fact...
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I'm with you, Husk man...I've used Amsoil in my work truck (95 dodge cummins diesel) stem to stern too, with the BIG bypass filter as well. I just drove her to San Diego today, I'm at 484,500 miles and running perfect. Original u joints!
I'm using lubrimoly (german product) full synth in my 560 sel, but when not I'll go Amsoil.
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