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Good to know. I am a convinced diehard user of Mobil One Extended Performance oils.. My Trucks go near 300,000 miles on it pulling heavy trailer for the last 25 years. I tore the engine down from one, there was barely any wear. If not for gasket fatigue [ It leaked everywhere by 300K ] over that many miles, it would have kept going.
 

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Royal Purple is royal crap.
Don't use it. Return it.
 

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I don t use it but several have told me that their oil temps run about 10-15 degrees higher under hard driving with RP than other oils.. I cannot verify that..
 

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Discussion Starter #10
Well I just figured out that walmart is not on the retailer list that qualifies for the rebate
Yeah, but they've honored Walmart rebate(s) in the past. I submitted my rebate requests last week for 2 x 5 qt jugs. I'll let you know if I hear anything from Mobil one way or the other.
 

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Well I just figured out that walmart is not on the retailer list that qualifies for the rebate
I bought mine at Costco and they knock off 2 bucks per qt. w/o having to mail anything.
 
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