I see we are eye to eye on the bosch crap 4's...lol. They do suck, I dont have an opinion on royal purple however, have never used it. I personally use Mobil1 synthetic and have never used anything else in my truck.
Chris
I see we are eye to eye on the bosch crap 4's...lol. They do suck, I dont have an opinion on royal purple however, have never used it. I personally use Mobil1 synthetic and have never used anything else in my truck.
Chris
2009 Silverado, HPTuners, all stock.
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