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Old 12-28-2006, 07:26 PM   #1 (permalink)
Buffalo
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LBZ Oil Change Intervals???

Hi,

A friend of mine just bought an '07 LBZ/ Allison (360-650). It's his first diesel & he is a bit confused about oil change intervals.

The manual does not give any mileage recommendations other than using the sensing device for oil change intervals. It says that if you accidently turn off the device, you have to change the oil within 3000 miles. So, he's thinking that oil change intervals are 3000 miles, which, can't be true.

I'm pretty sure the device sences when the oil is wearing out & indicates that it's time for a change. However, we are wondering how many miles you can go between changes, normally.

If all you guys use the device to let you know when to change the oil, at how many miles does that typically happen?

Thanks for your help.

Joe F.(Buffalo)
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Old 12-28-2006, 07:40 PM   #2 (permalink)
titus1998
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Starting out, I changed at 2500 miles to clear some break-in material. Then I changed again at around 7500 miles just to be sure.

I probably will change mine at 7000 mile intervals. The DIC will take me way further than 7000 miles. I might end up sending in a sample to a lab just to see how my oil is and go from there.

It depends a lot on your uses.

Check out the fluid section. This topic gets kicked around a lot and many different opinions go with it. Good luck on narrowing down an answer.

I think a lab is the best route to getting your proper routine given everyones different driving characteristics and uses.
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Old 12-28-2006, 07:44 PM   #3 (permalink)
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I changed mine every 2,500 untill 10,000. I just hit 10,000 so now I'll do synthetic and I figure I'll do it every 5,000 or so.
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Old 12-28-2006, 07:55 PM   #4 (permalink)
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Buffalo,

The truck's systems cannot detect when the oil is worn out. The oil change system reminder is programmed at the factory for 10,000 miles. Tell your friend to keep a record of his oil changes and it won't matter if the oil change reminder gets reset or not. BTW, 10,000 miles is a guideline. YMMV!
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Old 12-28-2006, 08:50 PM   #5 (permalink)
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Moved to Maintenance section.
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Old 12-28-2006, 08:50 PM   #6 (permalink)
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Quote:
Originally Posted by SixPak;1491851;
Buffalo,

The truck's systems cannot detect when the oil is worn out. The oil change system reminder is programmed at the factory for 10,000 miles.
Sorry, but this statement is incorrect.

The computer will determine when to change the oil based on driving conditions (engine coolant temperature, ambient temperatures, RPM, total engine revolutions, engine load, distance traveled, etc.) The reminder could come as early as 2,500 miles or as long as 10,000+ miles. However, it is only calibrated for dino oils, not synthetics. GM recommends to change the oil at least once a year even if the change oil reminder does not come on.

Most people do one or more oil changes during the first 1,000 to 5,000 miles to flush out all the manufacturing debris. After that, you can follow the recommendations from the Oil Life System (OLS) and be in good shape.

My OLS went approx. 9,800 miles for my last oil change. - I had the used oil analyzed at that time and was told that I could have gone longer if I had wanted to. I'm using Shell Rotella-T 5W-40 Synthetic.

You can read about the GM Oil Life System (OLS) HERE.
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Old 12-28-2006, 10:58 PM   #7 (permalink)
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Oil change interval

Correct. The OBC bases the oil change interval based on the input/output of the ECM...% throttle, % load, boost, mileage traveled, calculted fuel usage. ETC. It's the same as HD diesel engines. Good, but bad. If there are no glitches, it's all good, but if you lose a VSS or another sensor, it throws it all out of whack.
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Old 12-28-2006, 11:08 PM   #8 (permalink)
SixPak
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Quote:
Originally Posted by RayMich;1491969;
Sorry, but this statement is incorrect.

The computer will determine when to change the oil based on driving conditions (engine coolant temperature, ambient temperatures, RPM, total engine revolutions, engine load, distance traveled, etc.) The reminder could come as early as 2,500 miles or as long as 10,000+ miles. However, it is only calibrated for dino oils, not synthetics. GM recommends to change the oil at least once a year even if the change oil reminder does not come on.

Most people do one or more oil changes during the first 1,000 to 5,000 miles to flush out all the manufacturing debris. After that, you can follow the recommendations from the Oil Life System (OLS) and be in good shape.

My OLS went approx. 9,800 miles for my last oil change. - I had the used oil analyzed at that time and was told that I could have gone longer if I had wanted to. I'm using Shell Rotella-T 5W-40 Synthetic.

You can read about the GM Oil Life System (OLS) HERE.
I agree with your description of how the system indicates when an oil change is due, however, my statement is correct, in that the OLS system does not analyze the oil condition or quality of the oil as the original poster inferred. It does use 10,000 miles as a base or target for an oil change, and it will vary that figure depending on operating conditions & speeds as you stated. The OLS is merely an electronic guestimate of when the oil should be changed and not an analysis of the condition of the oil. The two are as different as night & day.

BTW, you can change the 10,000 figure in EFI Live. I've seen it with my own eyes! Do you know that the OLS will also recommend an oil change if the oil gets too hot..., 300° F IIRC. And that number can be changed also.
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Last edited by SixPak; 12-28-2006 at 11:18 PM.
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Old 12-29-2006, 11:25 AM   #9 (permalink)
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i did mine @ 1k,3k,6,and 12k and 3k their after rotella t 15w40
trans filter @6k
fuel filter @ 6k
diff fluids this weekend @ 13K
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Old 12-29-2006, 02:32 PM   #10 (permalink)
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It appears to me that the OLS is designed for the oil to be changed at 10000. Yesterday I changed my oil for the first time at 5006 miles and the DIC said 49%. BTW, about 3000 of the 5006 have been towing a 13k 5er.
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