Engine Scheduled Maintenance, Miles vs Hour Meter?

2292 Views 10 Replies 10 Participants Last post by Dieselman1017, Oct 25, 2018

Nelsonnomads

Discussion Starter · Oct 21, 2018

Just bought a 2015 with 95K and have been drinkin' from a fire hose on all the information available. I'm a aircraft mechanic and with aircraft the maintenance is scheduled by hours, cycles or calendar time. There can also be other usage factors that drive scheduled component changes or inspections but its never done by miles flown. The ED engine seems like it could be more particular when it comes to scheduled maintenance kinda like a turbine engine. With that said I have a few questions:
1) Is anyone doing oil & filter changes by the hour meter? If so what interval in hours are you using?

2) Has anyone figured out the algorithm for the "oil life" indication? Is it just miles based or does it take other things into account like idle time?

3) Any suggestions on a different fuel filter interval or do folks stick with every 30K miles?

Thanks for your time.

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Bounty Hunter

· #2 · Oct 21, 2018

Seems those who have been changing their oil in the 10k range have had good results on their oil analysis, so the need to be more diligent on hours doens't seem to be pressing.

I follow the owner's manual when it comes to fuel filter interval.

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97hmcs

· #3 · Oct 21, 2018

Nelsonnomads said:
Just bought a 2015 with 95K and have been drinkin' from a fire hose on all the information available. I'm a aircraft mechanic and with aircraft the maintenance is scheduled by hours, cycles or calendar time. There can also be other usage factors that drive scheduled component changes or inspections but its never done by miles flown. The ED engine seems like it could be more particular when it comes to scheduled maintenance kinda like a turbine engine. With that said I have a few questions:
1) Is anyone doing oil & filter changes by the hour meter? If so what interval in hours are you using?

2) Has anyone figured out the algorithm for the "oil life" indication? Is it just miles based or does it take other things into account like idle time?

3) Any suggestions on a different fuel filter interval or do folks stick with every 30K miles?

Thanks for your time.

1.10K mile oil changes are fine, no need to change based on hours.

2. On my 2014 the oil life is simply based on miles.

3. The fuel filter change interval has been revised to read every 20K miles or every 2nd oil change.

Here's the latest diesel supplement to the owners manual for the 2015:

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Captainmal

· #4 · Oct 21, 2018

Ya know I never ever heard of anyone doing oil changes based on the hour meter. That reads like a hint there might be lots of idling time. That can be a problem if the vehicle is stock with stock emission equipment. Hope you are not doing that.

Enjoy the truck. Follow the maintenance schedule as recommended. Now ride.

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Davef

· #5 · Oct 22, 2018

Nelsonnomads said:
Just bought a 2015 with 95K and have been drinkin' from a fire hose on all the information available. I'm a aircraft mechanic and with aircraft the maintenance is scheduled by hours, cycles or calendar time. There can also be other usage factors that drive scheduled component changes or inspections but its never done by miles flown. The ED engine seems like it could be more particular when it comes to scheduled maintenance kinda like a turbine engine. With that said I have a few questions:
1) Is anyone doing oil & filter changes by the hour meter? If so what interval in hours are you using?

2) Has anyone figured out the algorithm for the "oil life" indication? Is it just miles based or does it take other things into account like idle time?

3) Any suggestions on a different fuel filter interval or do folks stick with every 30K miles?

Thanks for your time.

Good thinking!!
i have done 17 oil changes on my 2016
average hours TT 450 -/+ each change

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phprof

· #6 · Oct 22, 2018

Personally, 6k miles for my truck. I only put on about 12k to 13k a year so it works out well. Fuel filter every 2nd old change. Every oil change if you have the coin to drop on it. They aren't that expensive. Follow the oil specifications in the diesel supplement. Full synthetic, 5W-40.

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jlarbey

· #7 · Oct 22, 2018

Nelsonnomads said:
Just bought a 2015 with 95K and have been drinkin' from a fire hose on all the information available. I'm a aircraft mechanic and with aircraft the maintenance is scheduled by hours, cycles or calendar time. There can also be other usage factors that drive scheduled component changes or inspections but its never done by miles flown. The ED engine seems like it could be more particular when it comes to scheduled maintenance kinda like a turbine engine. With that said I have a few questions:
1) Is anyone doing oil & filter changes by the hour meter? If so what interval in hours are you using?

2) Has anyone figured out the algorithm for the "oil life" indication? Is it just miles based or does it take other things into account like idle time?

3) Any suggestions on a different fuel filter interval or do folks stick with every 30K miles?

Thanks for your time.

250-300 hours when I change my oil. 250 is about 11k miles, 300 is about 14-6k miles. I'm tuned, so that does have an effect, as there is less soot in my oil compared to stock engines.

I drive about 90% highway. That's why I use hours instead of miles, highway vs city really throws off the 10k miles oil change standard since I'm all highway. It would be cutting myself short dearly if I didn't use hours.

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Bat Koce

· #8 · Oct 23, 2018

jlarbey said:
250-300 hours when I change my oil. 250 is about 11k miles, 300 is about 14-6k miles. I'm tuned, so that does have an effect, as there is less soot in my oil compared to stock engines.

I drive about 90% highway. That's why I use hours instead of miles, highway vs city really throws off the 10k miles oil change standard since I'm all highway. It would be cutting myself short dearly if I didn't use hours.

Hours is the way to go. I wish they had the hours specified instead of the miles.

Sent from my SM-N960U using Tapatalk

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howie12

· #9 · Oct 23, 2018

Actually, one of the best indicators of when to change oil on a diesel engine is by gallons of fuel consumed. This is driven by ensuring the oil TBN stays above 1 so you don't end up with the lube oil becoming acidic. The sulfur in the fuel is what causes acid to form. This method was quite common in the past with high sulfur diesel oil that used up the TBN more quickly than our modern ULSD.

HAve a look at the oil analysis thread under the maintenance section and you will see that the oil condition at 10,000 miles is almost always suitable for further service. For me I change at the indicated 10,000 miles and don't see the purpose of spending more money and making more waste oil by changing earlier when the oil is still fit for service when changed.

I would hypothesize that an engine in a vehicle sees a lot more variation from vehicle to vehicle and from oil change to oil change than an airplane where I would expect a lot more consistency between individual flights and pilots.

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Nelsonnomads

Discussion Starter · #10 · Oct 25, 2018

Great data guys. Thanks. I’ll probably track them all for the time being. Will do the first oil, filter and sample along with fuel filter early (5000) just to base line it.

Mine will be a mixed bag of use. Definitely not all stop and go.

I bought the tech data subscription off of the Mitchell DIY site. Are there any other OEM data sources available?

Thanks for the time.

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Dieselman1017

· #11 · Oct 25, 2018

I change engine oil every 5000 miles or 250 hours which ever comes first, the fuel filter I change every oil change the way I look at is oil and filters are cheap I not a fan of what the manufacturer says for service intervals they don’t care about the longevity of a vehicle once the warranty is up. Just my opinion since I have turned wrenches for over 20 years and stuck to this principal with my stuff and customers equipment and I can say that I have never have a major failure caused by maintenance. Hope this is helps.

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Engine Scheduled Maintenance, Miles vs Hour Meter?

Nelsonnomads

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97hmcs

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