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June 1st picked up 2 X 5 quart jugs of Mobil 1 EP 5W-30 at Walmart and submitted the $10 X 2 rebates...

Bill
Didn’t even know they had this. Will buy some today!

Edit: For some reason Walmart is not on their list though, and Walmart is still cheaper without the rebate than advance auto, or autozone
 
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2.5 gallons of this Mobil Delvac Extreme. Walmart for $52. Dad seen it has high temperature protection and his truck runs a little hot so he is trying to see if this can help. He said you can’t mix oil brands though so I can’t put this in with Rotella and I was like yeah you can why couldn’t you? He said it will mess with the additives in the other brands I said dad that’s not true and I pulled up a whole search history worth of “can you mix oil brands” here and showed him lol. So now he is going to mix them lol. He has been watching too much YouTube lol.
 
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2.5 gallons of this Mobil Delvac Extreme. Walmart for $52. Dad seen it has high temperature protection and his truck runs a little hot so he is trying to see if this can help. He said you can’t mix oil brands though so I can’t put this in with Rotella and I was like yeah you can why couldn’t you? He said it will mess with the additives in the other brands I said dad that’s not true and I pulled up a whole search history worth of “can you mix oil brands” here and showed him lol. So now he is going to mix them lol. He has been watching too much YouTube lol.
There is some efficacy to not mixing brands, while all oil should be miscible the anti oxidant chemistry may very between brands and mixing them may result in an oil that no longer meets the manufacturer approvals, like if you follow the long drain intervals on modern heavy duty trucks it's best not to mix brands or only mix brands as top up towards the end of the oil change interval.
 
There is some efficacy to not mixing brands, while all oil should be miscible the anti oxidant chemistry may very between brands and mixing them may result in an oil that no longer meets the manufacturer approvals, like if you follow the long drain intervals on modern heavy duty trucks it's best not to mix brands or only mix brands as top up towards the end of the oil change interval.
I see. He doesn’t do long intervals. Hopefully this will do no harm. These all meet the Caterpillar approval.
 
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