Oil Change interval question
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Cross-Country
Joined: May 2009
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From: Ohio
Oil Change interval question
I am running Shell Rotella T full synthetic, my oil change intervals are 10k miles. I use Motorcraft oil filter. My question is, is there any benefit to changing the oil filter at 5k miles?
Postmaster
Joined: Apr 2006
Posts: 3,524
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From: CA Bay Area
I run Rottela for 10,000 miles and send the sample to Blackstone Lab. They advised me to run it for 2000 more and no word about filter. PS is having huge filters and I assume they are design for long runs.
Elder User
Joined: Sep 2009
Posts: 628
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From: Parker, Colorado
I run normal 15-40. I change mine every 3k. It came with a oil change package when I bought my truck. I told them every 5k is good with me, but they insist on 3k. So Im not goin to complain lol. It just takes 45 minutes of my own time to get it done.
As far as your changes go. Change to a higher quality filter and you'll be good. Look at Mobile1 or the new Bosh Distance+. Great filters for syn oil, and easy to find.
As far as your changes go. Change to a higher quality filter and you'll be good. Look at Mobile1 or the new Bosh Distance+. Great filters for syn oil, and easy to find.
Thread Starter
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Cross-Country
Joined: May 2009
Posts: 56
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From: Ohio
the manual says now to change the oil every 5k miles. i don't have a problem replacing the filter @ 5k miles. i probably pay more for 2 filters but i get a new filter instead of having one on longer. Know what i mean?
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From: AL, Reform
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FTE Legend
Joined: Aug 2004
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From: North Central Rural Sask.
Best thing to do when your trying to figure out exactly how long you can go between oil changes, is get your oil tested. By testing your oil they can tell you alot of information, more then your owners manual ever will!
I run co-op 0-40 syn all year around, with donaldson filters, and I change mine every 10,000 kilometers.
I run co-op 0-40 syn all year around, with donaldson filters, and I change mine every 10,000 kilometers.
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Senior User
Joined: Feb 2008
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From: Central Washington State
What he said for me too. Except: when I tow my 5er I come in at around 20,000 lbs and I don't baby it. When I sent my sample at 10 thou they suggested that I only go 8000 between changes. I had towed for almost 6000 miles on that change.
Last edited by puller45; Aug 23, 2010 at 10:11 PM. Reason: Except
Senior User
Joined: Jun 2009
Posts: 288
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From: Maryland
Although I am using Delo 15w40 and MC oil filters, the MC oil is a decent oil choice. Hard to beat the price at WM 12 bucks for a 5 quart jug. Heck, you can do a MC oil and filter change for about 46 bucks, don't get any cheaper than that.
Posting Guru
Joined: Feb 2010
Posts: 1,411
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From: Opelika, AL
if you listen close enough your engine will tell you whe it's time to change...at least mine does. between 3K and 4K mine will start getting a little louder.... i change it between 4K and 5K and it says thank you 
Postmaster
Joined: Apr 2006
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From: CA Bay Area
I run Motorcraft oil for 5000 miles and had it tested. The results were worse than Rotella after 10,000 miles.
Post Fiend
Joined: Jun 2004
Posts: 9,293
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From: Parker, CO
For anyone running extended oil changes, you should always get oil samples tested.
The problem with extended oil changes on the PSD is the HPOP. Unlike many other diesels, our engines use a high pressure oil pump to drive the injectors, at pressures reaching close to 3000 psi on a stock engine when under load or WOT. The HPOP has a shearing effect on the oil, reducing the lifespan of the oil. Different oils react differently in regards to the amount of shearing, as does driving habits. If you tow a lot, or have a heavy right foot, that oil will shear faster.
The problem with extended oil changes on the PSD is the HPOP. Unlike many other diesels, our engines use a high pressure oil pump to drive the injectors, at pressures reaching close to 3000 psi on a stock engine when under load or WOT. The HPOP has a shearing effect on the oil, reducing the lifespan of the oil. Different oils react differently in regards to the amount of shearing, as does driving habits. If you tow a lot, or have a heavy right foot, that oil will shear faster.