Quote:
Originally Posted by bigtoys2004
I have used royal purple a few times and switched back to amsoil this time. More power with rp but didn't last long black as tar and burnt after 3000. Amsoil lasts much longer. I did the air box mod, put in a k n, used rp oil and mpg got worse. I'm gonna start back tracking til my mpg gets back to where it was.
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I've been pretty frustrated with my mpgs too. Mine's an auto 2.3 dura, regular cab with an extang tonneau too, and my range has been like 19-26, but my average tank is like 23.1. I'm hoping that summer time gas will show some consistently better numbers!