I've personally used both Royal Purple and Amsoil. I strongly believe that Amsoil is the best oil money can buy.
More info on Amsoil ... NST Is Your Houston Area AMSOIL Retailer! NonStopTuning
Please take a few minutes to check it out 
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www.NonStopTuning.com
Offering the best in Pulleys, Clutches & Flywheels, Coilovers, and more.
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