How many miles between oil changes? - Diesel Forum - TheDieselStop.com
6.7L Power Stroke Engine and Drivetrain Discussion of the 6.7L Power Stroke diesel engine and drivetrain in the 2011-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.7L Power Stroke engine.

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post #1 of 17 (permalink) Old 01-09-2017, 09:05 PM Thread Starter
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How many miles between oil changes?

This may be a dumb question but should I really not change the oil until the truck tells me to? This is the first vehicle I have ever had to say this. All my previous trucks(gas not diesel) I would change every 5k miles with full synthetic and never had issues. Also how many miles are you guys usually going between oil changes?
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post #2 of 17 (permalink) Old 01-09-2017, 10:05 PM
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The owner's manual...diesel....states about 7500 miles for oil change....You have an oil life monitor that will let you know the PCM thinks if you should change it sooner....you can also run a vehicle health report and keep tabs on your oil life.
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post #3 of 17 (permalink) Old 01-10-2017, 09:33 AM
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I change mine every 4500 miles.

Not going longer than that, I don't care what some monitor tells me.

Towing, idling, 120F ambient air temps, stop/go traffic...... Oil is cheap.

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post #4 of 17 (permalink) Old 01-10-2017, 12:06 PM Thread Starter
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That's my thought. I think I will stick with every 5k miles unless the computer tells me to earlier. Thanks guys
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post #5 of 17 (permalink) Old 01-31-2017, 02:41 PM
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Terry Dyson Dyson Oil Analysis Reports told me the 6.7 has fuel dilution issues with the oil ... the DPF/EGR? ...

anyhow, while I know he's in business to analyze oil, I trust his analysis and he recommends checking it no less frequent that 5000, which is the Ford recommendation for a change.

Amsoil also recommends the 5000 change on the 6.7 for this reason.

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post #6 of 17 (permalink) Old 02-05-2017, 09:15 PM
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Owned 3 Powerstrokes since 1995 and changed every 5,000 miles. Never a problem (knocking on wood....). Given the oil has to cool, clean, lubricate and provide high pressure for fuel delivery, it's cheap insurance.

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post #7 of 17 (permalink) Old 02-06-2017, 08:58 AM
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Originally Posted by 42Pilot View Post
Given the oil has to...
...provide high pressure for fuel delivery
They no longer use a HPOP, that stopped with the 6.0.

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post #8 of 17 (permalink) Old 02-06-2017, 10:11 AM
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I go between 5000 and 7500 depending what I am doing during the OCI. I have used Kendall Super-DXa (15W-40), Chevron Delo (5W-40 and 10W-30), Shell Rotella (5W-40), and Mobil ESP (5W-40). I prefer xW-40 and have ran a few UOAs and aside from some fuel dilution (moderate) all of them came back acceptable. Less than 5K is probably not needed, but of course, one has to be comfortable with their choices.


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post #9 of 17 (permalink) Old 02-06-2017, 01:45 PM
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I use the Severe Maintenance schedule in the owner's manual.

–Moderate to heavy load/towing
–Mountainous or off-road conditions
–Extended idling
–Extended hot or cold operation

Change it every 5000 like clockwork.
125,000 and still going strong.
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post #10 of 17 (permalink) Old 02-10-2017, 07:19 AM
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Changing every 5K makes the math easy.


On my 3rd power stroke no isssues.
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post #11 of 17 (permalink) Old 02-10-2017, 06:07 PM
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Previous Powerstrokes, I changed the oil every 5,000 miles., As stated that was easy math to know when it was due. When I bought my 2011 truck back in August 2010. There was a Ford Engineer on this or one of the other forums and he said they were going over 11,000 miles per oil change with no problems. It was more of a "Lets be safe" opinion when they set the oil change interval at 7500 miles.

I sent in a couple of oil samples for testing and the oil was fine at the 7500 mile marker, So I got lazy just started changing the oil when the Oil Life Monitor tells me it due. Which is about every 7500 miles. I ran my 2011 truck for 145,000 miles before I sold it and bough 2015 truck. It was running great and I had very minor problems with that truck over it's life or with my current 2015 truck.

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post #12 of 17 (permalink) Old 02-18-2017, 05:32 PM
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Quote:
Originally Posted by lincster View Post
I change mine every 4500 miles.

Not going longer than that, I don't care what some monitor tells me.

Towing, idling, 120F ambient air temps, stop/go traffic...... Oil is cheap.
Hmmmm, well 5 quarts is cheap but 3 Gallons, plus filter and plus, plus,plus.

The monitor takes all those variables into consideration.
Oil is not depleted even at 7500 mile.

All this 3000 mile oil change started with a purpose behind it, and it as follows.

The average business man, soccer mom etc. drives 10-12k per year, and would never open the hood of their car unless oil light went on or there was a strange noise of some kind. So since oil is cheap the answer was change every 3000 miles, and while we are in there we'll top off all fluids and check battery and whatever else we can sell you. that way we get a steady customer and you have a safe vehicle that's checked-over 4 times a year, win win for all, and then it became the standard.( you'll notice manufactures numbers are higher, 5-7 K miles) The oil companies keep brewing up better and better oil and more expensive too, now they have a captive audience, Remember have to change every 3K.

Well the truth is you don't. independent labs and articles have been written saying that used oil At 3K is not nearly spent, sometimes not even half life.
You have 3+ gallons in a 6.7L engine, yes it's a diesel and yes it has more carbon and is dirtier but you have 3 time more oil too.
I'm not super rich and i'm not poor either, I waste money by accident all the time, i'm not going to do it on purpose.

Some very interesting articles written on the subject and lab studies.
4500k your oil is probably in great shape, Just saying.
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post #13 of 17 (permalink) Old 02-19-2017, 08:12 AM
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Hmmmm, well 5 quarts is cheap but 3 Gallons, plus filter and plus, plus,plus. The monitor takes all those variables into consideration. Oil is not depleted even at 7500 mile.
While I agree that a 3K OCI is a total waste and 4.5K is borderline, I have seen moderate fuel dilution in some of the UOAs on my 6.7L so I would not blindly go to a 7.5K OCI without testing the oil. Many have a 5K OCI for convenience--easy to remember to change the oil on the 5's.


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post #14 of 17 (permalink) Old 02-19-2017, 09:08 PM
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Quote:
Originally Posted by Jimbo40 View Post
Hmmmm, well 5 quarts is cheap but 3 Gallons, plus filter and plus, plus,plus.

The monitor takes all those variables into consideration.
Oil is not depleted even at 7500 mile.

All this 3000 mile oil change started with a purpose behind it, and it as follows.

The average business man, soccer mom etc. drives 10-12k per year, and would never open the hood of their car unless oil light went on or there was a strange noise of some kind. So since oil is cheap the answer was change every 3000 miles, and while we are in there we'll top off all fluids and check battery and whatever else we can sell you. that way we get a steady customer and you have a safe vehicle that's checked-over 4 times a year, win win for all, and then it became the standard.( you'll notice manufactures numbers are higher, 5-7 K miles) The oil companies keep brewing up better and better oil and more expensive too, now they have a captive audience, Remember have to change every 3K.

Well the truth is you don't. independent labs and articles have been written saying that used oil At 3K is not nearly spent, sometimes not even half life.
You have 3+ gallons in a 6.7L engine, yes it's a diesel and yes it has more carbon and is dirtier but you have 3 time more oil too.
I'm not super rich and i'm not poor either, I waste money by accident all the time, i'm not going to do it on purpose.

Some very interesting articles written on the subject and lab studies.
4500k your oil is probably in great shape, Just saying.
Well, since I don't drive like a business man or soccer mom, I drive my truck for what it was built for. Towing 17,000lbs, almost maxed out on GVWR and GCWR, at 20lbs of boost alllllll the time......

So I will stay at my fluid change interval.

I don't take my truck anywhere to have fluids changed, filters changed etc. I do them all myself so I know they are done right.

I don't want some 17 year old kid in the back putting 15 qts of 15W40 in my truck cause he can't tell the difference between a 7.3L and 6.7L.

The only time I waste money on purpose is when I am getting 3mpg in my 450HP sandrail doing 85mph through the dunes........ with a huge grin on my face the whole time.
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post #15 of 17 (permalink) Old 02-20-2017, 05:00 PM
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Quote:
Originally Posted by lincster View Post
...

I don't want some 17 year old kid in the back putting 15 qts of 15W40 in my truck cause he can't tell the difference between a 7.3L and 6.7L.
x2 ... I got broke from suckin eggs. Get geared up to drain 12 quarts in a HURRY (no autozone funneling drain pan) ... open drain pan; old school. and do it yourself.

I'm pretty convinced mine was over-serviced by Quick Lane for the last 5K miles. I've been monitoring my oil quantity like a hawk over this last thousand miles and 3 weeks.. It's been consistently full ... not overfull. I assumed last time. I may have gotten-away with one.

Al

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