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Thats true, but i like havin peice of mind knowing that I've experienced better results with RP over Mobile1 and that since i opted for Royal Purple, i have more peice of mind knowing that if i decide to autox or drive the engine harder or higher rpms, that i have purchased the oil that has a better reputation (in my eyes) as far as internal engine protection goes.
Maybe if Mobile1 had polishing molicules then i would switch back, but I've come to trust RP over the years. I guess you have to try it before you dismiss it as marketing hype.
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