I have always used Mobile 1... but my last change there was a nice deal on Royal Purple: 5 quarts and the oil filter for what the 4 quart bottle of Mobile 1 cost.... so i said screw it lets see what all the hype is about...
Dude... this stuff is purple... Like in the color purple. I always thought royal purple was just a name that came out of nowhere... (i get entertained by things like that)
anyways... I have not noticed any difference at all between the Mobile 1 or RP... both work well, both smell good, and both will only be in the car for 3,000 miles.
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Where are my aluminum pedals? 
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