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post #1 of 21 Old 11-06-2009, 09:06 AM Thread Starter
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oil change frequency

after reading quite a bit here this is what i am going to do regarding oil type and changing frequency;

rotella t 5w40 synthetic year round that will be changed every 10k
motorcraft filter that will be changed every 5k

thoughts?
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post #2 of 21 Old 11-06-2009, 09:17 AM
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I'd change the filter every 5K like you stated, but I'd also do an oil analysis too. What's another $20 for piece of mind...

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post #3 of 21 Old 11-06-2009, 09:31 AM
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I use the OEM interval of 7500 miles. I change my Oil Guard By-pass kit filter every other oil change and the main filter every oil change.


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post #4 of 21 Old 11-06-2009, 09:44 AM
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Quote:
Originally Posted by HeavyAssault View Post
I use the OEM interval of 7500 miles. I change my Oil Guard By-pass kit filter every other oil change and the main filter every oil change.
Are you running synthetic?

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post #5 of 21 Old 11-06-2009, 09:47 AM
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Yep. Mobil 1 or Valvoline Extreme 5w40.


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post #6 of 21 Old 11-06-2009, 10:06 AM Thread Starter
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do you tow alot or drive in conditions that require you to change it out that much, or is it more for a just in case thing?

just gathering info, i thought sythetic should be able to go 10k with a filter change.
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post #7 of 21 Old 11-06-2009, 06:34 PM
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Same as HeavyAssault...only use Mobil1 5w-40, change primary oil filter with only Motorcraft at 7500 miles. I also use Amsoil's EaBp 100 >2 micron bypas filter and change it every other oil change or at 15,000 miles. I do dump the EaBp filter and thouroughly clean the top and refill it with oil as well before adding new oil to the system. I also use the Fumoto drain valve which helps (less mess) and a have a silver dollar sized magnet near the drain plug (since I no longer have the old drain plug magnet).

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post #8 of 21 Old 11-06-2009, 06:39 PM
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I've read a few reports that the Rotella 5w-40 loses it viscosity pretty quick in the oil shearing 6.0. I'm trying Mobile 1 diesel this time around.

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post #9 of 21 Old 11-06-2009, 07:04 PM
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Without a oil bypass kit I still couldnt see going 5000 miles in between oil changes. The guy before me changed his oil every 5 thousand miles and ran normal 15w40 and man you should see my injectors. They are all gummed up and burnt oil on them. After seeing that I couldnt even run synthetic oil 5000 miles without changing oil.
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post #10 of 21 Old 11-07-2009, 03:00 AM
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I researched OA's, oil reports till my head was ready to melt. I discovered the majority of users running bypass kits were only getting 10K (maybe better) out of the oil. So why tempt fate? I use the OEM interval of 7500 miles but I don't exceed 10k between changes. Sometimes work or other requirements will cause me to go above the 7500 so I try to stay under 10k at that time.

These motors aren't picky they just need clean fluids. I spent the money to get this motor and damn sure going to take care of it as best my knowledge and the knowledge we share will allow.


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