Oil Life - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > Duramax Fifth Generation: 2011-2016 (LML)
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Advertise

Duramax Fifth Generation: 2011-2016 (LML) Discuss the fifth generation (2011-2016) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 08-28-2018, 01:30 PM   #1 (permalink)
jamn
Block Heater
 
Join Date: Sep 2003
Location: Yorba Linda, CA
Posts: 19
iTrader Score: 0 reviews

Oil Life

I have a 2014 Silverado 2500 HD (Duramax/Allison) and I notice that the oil life indicator increments down when I wouldnít expect it to. Example: I donít drive it much at all, and I may go an entire week without driving it. What I notice is that the oil life percentage sometimes increments downward 2% or so just after sitting for a week. I only have 14000 mile on this truck, and Iíve already changed the oil about a half dozen times. The dealer states that theyíve never seen this problem, theyíre not sure if it really is a problem. They say that it could be because itís used for short trips (and I make an effort to drive it at least 5 miles after starting it up). Has anyone else experienced this?

__________________
2014 Silverado 2500 HD LML Duramax


Jamn
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-28-2018, 02:16 PM   #2 (permalink)
redwngr
Diesel Expert
 
Join Date: Jan 2008
Location: SW ONT
Posts: 2,803
iTrader Score: 0 reviews

The usual 'complaint' or observation is that it counts down slower than some think it should.

It is supposed to factor in temperatures/miles/time/power levels/rpm/etc. If it is only run for a few minutes it is probably not getting coolant and oil fully up to temperature and will likely be accumulating more moisture than normal.

GM does recommend changing by the OLM, OR at least once per year, if usage is low.

It does not have a sensor sampling/testing the oil, and it assumes the oil being used is what is recommended in the manual.

If the truck 'lives' in a low humidity climate, it's likely not accumulating moisture like it would in a humid location.


If you want to run longer than the OLM, you can always reset it without changing the oil, (no sensor, so it has no way of knowing) so that the prompt screen doesn't pop up every time you start it.

If it was mine, I'd likely mix in the an occasional run long enough to fully warm it up.
And probably not change it more than once a year.

__________________
2018 L5P Sierra 4x4 SB Denali
Sold 2011 LML Sierra 4x4 CCSB SLT
Sold 2010 LMM Sierra 4x4 CCSB SLT
Sold 2004.5 LLY Sierra 4x4 ECLB SLE
Offline   Reply With Quote Quick reply to this message
Old 08-28-2018, 02:58 PM   #3 (permalink)
jamn
Block Heater
 
Join Date: Sep 2003
Location: Yorba Linda, CA
Posts: 19
iTrader Score: 0 reviews

Reply to Oil Life thread

I do run it up to operating temp on the temp gage. The thig that I find puzzling is that for example, I can park it at the time that the oil life is reading 75%. After about a week I start it up, and it 's at 73%. Does it know how long the engine is setting without being run???
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-29-2018, 12:07 AM   #4 (permalink)
sowilson
Diesel Head
 
Join Date: Apr 2007
Posts: 524
iTrader Score: 0 reviews

get an analysis kit from Blackstone labs, sample your oil, and have it tested. 12 oil changes in 14000 miles??? That's nuts. I would change the oil at least once a year. For my truck the sweet spot is every 6 months with 7500-15000 miles (lower number is daily driving, larger number is if I'm going on cross country trips). Let oil analysis help you determine what's right for your truck, your OLM could be broken.
__________________
2007 GMC Sierra 2500HD LMM, CC, Dark Blue Metalic, Nav
Offline   Reply With Quote Quick reply to this message
Old 08-29-2018, 12:41 AM   #5 (permalink)
redwngr
Diesel Expert
 
Join Date: Jan 2008
Location: SW ONT
Posts: 2,803
iTrader Score: 0 reviews

Original post does say say 'about' 1/2 dozen, not 12 changes.

If the 14 was bought in fall 1 and changed every 12 months
then changes fall of 14, 15, 15, 17 and now would be 5 changes.

A lot for 14,000 miles, but sorta lining up with the 'at least every 12 months' recommendation. (and it would be 'about' and 1/2 dozen.)
__________________
2018 L5P Sierra 4x4 SB Denali
Sold 2011 LML Sierra 4x4 CCSB SLT
Sold 2010 LMM Sierra 4x4 CCSB SLT
Sold 2004.5 LLY Sierra 4x4 ECLB SLE
Offline   Reply With Quote Quick reply to this message
Old 08-29-2018, 11:04 AM   #6 (permalink)
jamn
Block Heater
 
Join Date: Sep 2003
Location: Yorba Linda, CA
Posts: 19
iTrader Score: 0 reviews

Since the oil life percentage seems to increment downward between the time I park it, and the next time I drive it, does it make sense that the program used to determine oil changes includes a general timer, as well as operating temp, RPM, etc.....?
__________________
2014 Silverado 2500 HD LML Duramax


Jamn
Offline   Reply With Quote Quick reply to this message
Old 08-29-2018, 01:12 PM   #7 (permalink)
ktmrfs
Diesel Boss
 
Join Date: Jul 2004
Location: Portland, OR
Posts: 1,468
iTrader Score: 0 reviews

Quote:
Originally Posted by jamn View Post
I do run it up to operating temp on the temp gage. The thig that I find puzzling is that for example, I can park it at the time that the oil life is reading 75%. After about a week I start it up, and it 's at 73%. Does it know how long the engine is setting without being run???
easy answer: GM oil life monitor looks at HOW you drive and TIME. the oil life indicator will be at 0% after 1 year. that is 2%/week. So if it is just sitting, it will decrement down by 2%/every week if you drive or not. And it will also take into account drive cycle.
__________________
2015.5 Sierra Denali CC/SB/4x4 Stone Blue Metallic/Jet Black Interior
pinstriping by Bob Spencer AKA "spirit", undercover FLEX tonneau cover, color matched bug shield and vent visors, raintracker rain sensing wipers, X-treme coating bedliner, gm trailering camera system, coolant filter, Bilsteins, remote tailgate lock

04.5 LLY CC/SB/4x4 Allison Dark Green Metallic/Dark Charcoal Grey Interior
Webasto Hollandia Sunroof, Carbon Fiber Interior Trim, color matched bug shield & vent visors X-treme coating bedliner, Access roll top cover, Westin Step Bars, Lubrication Specialists Aux fuel filter, coolant filter, CAI, Michelin LTX tires, Manual High Idle Mod, Bilsteins, prodigy brake controller, raintracker rain sensing wiper controller, Remote autolocking tailgate, Reese Titan Class V hitch, Allison badges, Pinstriping by Bob Spencer, 4x4 decals removed, color matched door handles, 4 headlight mod, Homelink console.

97 Mercedes SL500, red with tan interior 97 Mercedes E420 sedan, royal indigo with grey interior 2001 KTM400EXC, 2011 Outback 295RE travel trailer
Offline   Reply With Quote Quick reply to this message
Old 08-29-2018, 01:13 PM   #8 (permalink)
ktmrfs
Diesel Boss
 
Join Date: Jul 2004
Location: Portland, OR
Posts: 1,468
iTrader Score: 0 reviews

Quote:
Originally Posted by jamn View Post
I do run it up to operating temp on the temp gage. The thig that I find puzzling is that for example, I can park it at the time that the oil life is reading 75%. After about a week I start it up, and it 's at 73%. Does it know how long the engine is setting without being run???
YES!
__________________
2015.5 Sierra Denali CC/SB/4x4 Stone Blue Metallic/Jet Black Interior
pinstriping by Bob Spencer AKA "spirit", undercover FLEX tonneau cover, color matched bug shield and vent visors, raintracker rain sensing wipers, X-treme coating bedliner, gm trailering camera system, coolant filter, Bilsteins, remote tailgate lock

04.5 LLY CC/SB/4x4 Allison Dark Green Metallic/Dark Charcoal Grey Interior
Webasto Hollandia Sunroof, Carbon Fiber Interior Trim, color matched bug shield & vent visors X-treme coating bedliner, Access roll top cover, Westin Step Bars, Lubrication Specialists Aux fuel filter, coolant filter, CAI, Michelin LTX tires, Manual High Idle Mod, Bilsteins, prodigy brake controller, raintracker rain sensing wiper controller, Remote autolocking tailgate, Reese Titan Class V hitch, Allison badges, Pinstriping by Bob Spencer, 4x4 decals removed, color matched door handles, 4 headlight mod, Homelink console.

97 Mercedes SL500, red with tan interior 97 Mercedes E420 sedan, royal indigo with grey interior 2001 KTM400EXC, 2011 Outback 295RE travel trailer
Offline   Reply With Quote Quick reply to this message
Old 08-29-2018, 02:06 PM   #9 (permalink)
G2GBY
Diesel Boss
 
G2GBY's Avatar
 
Join Date: Aug 2017
Posts: 1,248
iTrader Score: 0 reviews

Quote:
Originally Posted by jamn View Post
Does it know how long the engine is setting without being run???
Yes,
Based on data collected over decades of extensive powertrain testing, GM engineers have developed sophisticated algorithms that reflect how time, engine speeds, engine temperatures, load, and other factors affect oil life. By plugging in real-world data for those variables, the Oil Life Monitor can accurately calculate when an oil change is needed and display the remaining oil life within the Driver Information Center.
Offline   Reply With Quote Quick reply to this message
Old 08-29-2018, 04:45 PM   #10 (permalink)
jamn
Block Heater
 
Join Date: Sep 2003
Location: Yorba Linda, CA
Posts: 19
iTrader Score: 0 reviews

OK if the 2% drop per week is accurate, this is exactly what I'm seeing. The other drops could be due to short trips (although operating temp is reached). Thank you for the information. I'll pass this on to the service team at the dealer :-)

__________________
2014 Silverado 2500 HD LML Duramax


Jamn
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil pressure running high, just cleaned CDR (tuna can) smashfistmctip 6.5L Diesel Engine 28 05-25-2018 01:14 PM
2008 issues with oil life EGR related??? Iggle Duramax Fourth Generation: 2007.5-2010 (LMM) 15 12-25-2017 02:23 PM
DIY: How To Swap/Replace Faulty OEM Oil Cooler Lines with SS Braided (Pic Heavy) ForeverFalcon40 6.5L Diesel Engine 74 05-10-2016 10:07 PM


All times are GMT -4. The time now is 12:08 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide