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Nice. I can't believe how Royal Purple was proven to be complete garbage.
I know right!!! I will still use RP as my motor oil because I honestly felt a difference when I switched from mobil 1 my truck started running smoother and got better MPG. But when it comes time to swap other fluids amsoil is where it's at!!
 

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Glad that AMSOIL is un-biased too!
 

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oil is oil and a filter is a filter imo. i use whatever is on sale at the time of my oil changes. 5 years and engine still running good.
 

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Discussion Starter #6 (Edited)
5 years and engine still running good.
I'm talking about gear oil. It's a completely different animal.

But when it comes time to swap other fluids amsoil is where it's at!!
They DO make a manual transmission GL-4 spec oil, in case you have a 5 or 6 spd. :)
 
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