Change or not?

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Originally Posted By: OVERK1LL
Originally Posted By: OldCowboy
Originally Posted By: dubie2003
Make sure you have the updated software for the oil change light thingy. The DI motors were updated since they destroy the oil.


I call B-S on this.


It is true.


I'd like to see something other than a couple of opinions. Please provide a reference that says that DI motors "...destroy the oil."
 
Originally Posted By: OldCowboy
Originally Posted By: OVERK1LL
Originally Posted By: OldCowboy
Originally Posted By: dubie2003
Make sure you have the updated software for the oil change light thingy. The DI motors were updated since they destroy the oil.


I call B-S on this.


It is true.


I'd like to see something other than a couple of opinions. Please provide a reference that says that DI motors "...destroy the oil."


Go look in the UOA section. Look at the fuel dilution (amongst other things) and then the TSB from GM regarding the reprogramming of the OLM's on the DI vehicles.

A couple I just found:

https://bobistheoilguy.com/forums/threads/09-outlook-3-6-di-valv-synpower-5w30-4681-miles.157222/

https://bobistheoilguy.com/forums/threads/mobil-1-0w30-12-000miles-gmc-terrain.157217/
 
Go look in the UOA section. Look at the fuel dilution (amongst other things) and then the TSB from GM regarding the reprogramming of the OLM's on the DI vehicles. [/quote]

The reprogramming was probably because the original had them going almost 12,000 miles or 1 year on an oil change for a high feature DI V6 engine. That was a little too ambitious, wouldnt you say?
 
For goodness sakes, this engine has 3 timing chains, Vvt (variable valve timing) and the tranny in sport mode regularly brings it to the redline (7,000 rpm). Believe me I know... :-)
 
Originally Posted By: johnachak



The reprogramming was probably because the original had them going almost 12,000 miles or 1 year on an oil change for a high feature DI V6 engine. That was a little too ambitious, wouldnt you say?


But that supports the point sir!

The reprogramming is because the DI engines are much harder on oil than their traditional port injection counterparts for which the OLM was originally designed.

UOA's showing viscosity loss, loss of TBN and fuel dilution support this. Some of the reports show oil that is CLEARLY shot with the oil not halfway gone on the OLM!!!

GM's reprogram drastically reduces the duration of the OCI's that the OLM dishes out to address this.
 
I wouldnt be worried at all. The oil isnt going to break down just sitting. It was in the earth for millions of years before it was in your car. Im sure Id change it after a decent break in period of 1.5-2k.
 
Originally Posted By: OVERK1LL
Originally Posted By: johnachak



The reprogramming was probably because the original had them going almost 12,000 miles or 1 year on an oil change for a high feature DI V6 engine. That was a little too ambitious, wouldnt you say?


But that supports the point sir!

The reprogramming is because the DI engines are much harder on oil than their traditional port injection counterparts for which the OLM was originally designed.

UOA's showing viscosity loss, loss of TBN and fuel dilution support this. Some of the reports show oil that is CLEARLY shot with the oil not halfway gone on the OLM!!!

GM's reprogram drastically reduces the duration of the OCI's that the OLM dishes out to address this.


OVERK1LL is right. I spent a lot of time on the CTS and SRX forums before I bought the CTS and this was really showing up a lot on the SRX forums and some on the CTS forums. My only consolation is I NEVER would have gone as long as folks were going using the OLM for guidance.
Since the DI engines appear to be somewhat harder on oil, I will take a conservative stance and change the oil probably on a 6-7 month/4500 mile interval. Just haven't decided whether or not to use Amsoil (which I really like) or PP which is "approved".
 
Seeing as how there are strong feelings both ways, I have decided to change the oil now. I just don't feel comfortable leaving used oil in an engine past one year.
Thanks to all that responded.
 
Originally Posted By: OldCowboy
Thank you. Those UOAs certainly make it look like there could be an issue with DI engines.


Why does everyone just mention the DI aspect? ANY engine with 3 timing chains, 300+ hp naturally aspirated, coupled to a sport oriented tranny that brings it to the 7000 rpm redline often would be hard on the oil and I would NEVER try to do 10-12000 mile OCI under those conditions. Lets not just blame the DI. They were unconscious to have an OLM come up with those ridiculously long OCI's.
In
My opinion of course.
 
But that supports the point sir!

The reprogramming is because the DI engines are much harder on oil than their traditional port injection counterparts for which the OLM was

GM's reprogram drastically reduces the duration of the OCI's Quote

Ever heard of shearing?
Why does everyone just mention the DI aspect? ANY engine with 3 timing chains, 300+ hp naturally aspirated, coupled to a sport oriented tranny that brings it to the 7000 rpm redline often would be hard on the oil and I would NEVER try to do 10-12000 mile OCI under those conditions. Lets not just blame the DI. They were unconscious to have an OLM come up with those ridiculously long OCI's.
In
My opinion of course. [/quote]
 
Last edited:
Changed the oil. And found it was MUCH darker than I would have expected with only 583 miles on the oil. My other two cars can get to 1000 miles easy before I can easily see the level on the dipstick, IE dark. So, whether it's coincidence, or because it's new, or whatever, I'm glad I changed it.
 
I forgot to mention that the Caddy service manager said there was a problem with low oil level attributed partly to the OLM. He said, if driven spiritedly
(not exactly the term he used) the motor can use around a qt of oil in 2-3000 miles. If someone runs it to 12000 miles and mistakenly believes the OLM saying the oil is still good means the level is ok, thats a problem. He said most of the cars he did with stretched chains were very low on oil and near the end of the OLM.
 
Originally Posted By: johnachak
I forgot to mention that the Caddy service manager said there was a problem with low oil level attributed partly to the OLM. He said, if driven spiritedly
(not exactly the term he used) the motor can use around a qt of oil in 2-3000 miles. If someone runs it to 12000 miles and mistakenly believes the OLM saying the oil is still good means the level is ok, thats a problem. He said most of the cars he did with stretched chains were very low on oil and near the end of the OLM.

That is probably mostly what I saw on the Caddy forums. Reliance on the OLM and not watching the oil level. OBTW, just another reason I wont buy BMW's any more. They are taking the dipsticks off their engines. Sounds to me like a good way to drive the buyer back to the dealer.
 
^^ You guys bring up some good points. ^^

I think in some instances the OLM can do more harm than good. There are plenty of people that feel the OLM is the green light to keep the hood closed until the OLM tells them to change the oil. At that point they bring the car back to the dealer and let him open the hood. Those cars are the cars to stay clear of in the used car market. JMO
 
At that point they bring the car back to the dealer and let him open the hood. Those cars are the cars to stay clear of in the used car market. JMO [/quote]

Those are becoming more prevalent at an alarming rate. I cannot tel you how often that I mention you need to check your oil and I get the old; "No you don't, the car checks it for you now" or some other odd statement coming from otherwise intelligent individuals.
 
Originally Posted By: demarpaint
^^ You guys bring up some good points. ^^

I think in some instances the OLM can do more harm than good. There are plenty of people that feel the OLM is the green light to keep the hood closed until the OLM tells them to change the oil. At that point they bring the car back to the dealer and let him open the hood. Those cars are the cars to stay clear of in the used car market. JMO
Originally Posted By: johnachak
At that point they bring the car back to the dealer and let him open the hood. Those cars are the cars to stay clear of in the used car market. JMO


Those are becoming more prevalent at an alarming rate. I cannot tel you how often that I mention you need to check your oil and I get the old; "No you don't, the car checks it for you now" or some other odd statement coming from otherwise intelligent individuals. [/quote]

I absolutely agree with both of you. One of the reasons I buy new instead of used.
 
Originally Posted By: NewC6
Seeing as how there are strong feelings both ways, I have decided to change the oil now. I just don't feel comfortable leaving used oil in an engine past one year.
Thanks to all that responded.


Excellent choice, 3/4's of the yahoos on here are crazy
crackmeup2.gif
 
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