Mixing motor oils - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 06-07-2012, 12:40 PM Thread Starter
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Mixing motor oils

I am about to change my motor oil. Realized that I may be short about a quart of Rotella 5w40, but I still have some Mobil 1 5w40. Is there a problem in mixing the two.
I have used both in the past. I use what ever is on sale. This time it was Rotella T6.

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post #2 of 5 Old 06-07-2012, 12:48 PM
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I've done it before, as long as the viscosities are the same, I do it


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post #3 of 5 Old 06-07-2012, 02:00 PM
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you're mixing a couple quarts when you change between brands anyway because of whats left over in the HPO system. Ain't gonna hurt a thing

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There u go Tom. John may not be sexy, but he can tutor you, lol.
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post #4 of 5 Old 06-07-2012, 09:14 PM Thread Starter
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Thanks. Then I am ready to go.

If your commin, it's over. If your stroken, it's just started.


2007 F250 6.0L PSD Lariat - Dieselsite Coolant Filter - Bilstein Shocks - Blue fuel pressure upgrade spring - Country Duel Steering Stabilizer - Fumoto Oil Drain Valve - HFCM Water Separator Drain Plug Upgrade - ARP studded - Engine Oil (Rotella syth) - Rear Diff. & Front Axle (Royal Purple)
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post #5 of 5 Old 06-08-2012, 04:16 AM
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Even the viscosities don't really matter cuz they break down and change quickly with most oils.


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