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royal purple vs amsoil

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Discussion Starter #1
which is truley better
 

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Skrew- EPA CARB OPEC PETA
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Im rumming amsoil now but gonna switch to RP next change and see what my oil analysis says.
 

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I prefer Amsoil, have been running the HDD 5w-30 the past two years with great results.
 
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Had great UOA from 5w30 HDD and never seen the TBN under 10 at the 7K.
 

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I might be a little late but ill say this about Amsoil.
I just recently changed my front and rear diff. fluid on my truck and this is what i have noticed: According to my Edge my Load went from 38% at 70mph to 26%. now if that aint lubrication i dont know what is. Im buyin this stuff for life.
 
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