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Old 05-04-2011, 08:20 PM   #51
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id just like to know where to check the olm I was hoping there was one cuz im at the 5k mark since I got my car (used) and was getting kinda antsy.
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Old 05-04-2011, 08:27 PM   #52
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Quote:
Originally Posted by Milk 1027 View Post
I understand the piece of mind, and I understand that people want to change the oil that early for that reason. What I don't get is that people would seriously question GM's long time research and development of this system. Doing for the piece of mind is fine, but doing it because you don't believe what GM engineers say about their own cars?

Not talking about you sepcifically or anyone in this thread, but people in general.
Yup. I agree. How can you trust they built a good car but not trust that they know what they are doing.

I've been going about every 6k. I haven't even looked at the indicator. I probably could go further but it freaks me out. lol I've been brainwashed and it's scary to change.
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Old 05-04-2011, 10:00 PM   #53
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so you'd rather trust your eyes (that I'm sure are calibrated to judge actual contamination of oil, not just its "dirty look") over a system designed by engineers for the sole purpose of telling you if your oil is good or not?

sorry, but "How it looks on the stick" doesnt cut it when it comes to an engine on a $35,000 car.
What I meant by that is if I pull the dipstick out, and it is so dark and nasty that I can't even see the dipstick through the thin film on the dipstick, I'd say it's time to change it whether the OLM has 50% left or not. I've never gone long enough to set off the "Change Oil Light" in my Oldsmobile, and probably never will. It takes 4 and a half quarts, and to make it to 10,000 miles, I'd have to put two in anyway. So I'd be saving about 2 quarts every 10,000 miles by stretching it. Is saving that extra $4 really worth it?

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Originally Posted by justa25thTA View Post
And GM is backing up their OLM with a 100K warranty on the power train.
So we know the OLM will get the car to 100K miles, but what about after that? Changing every 5000 miles instead of when the computer says to may make the difference between an engine that survives 150K miles and one that goes 250K. For someone like me whose daily driver is approaching the 140K mark, that's a rather big deal.
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Old 05-04-2011, 10:56 PM   #54
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You this brings reminds me of when I had and old dodge aspen for a winter beater. Everyone said the slant 6 was bullet proof. So I decided to see how long it would run without even checking the oil let alone changing. It seized up after 22,000 miles one morning on my way to work. The funny thing was though, was when we towed it home I put oil in it and it had all day to cool , and I tried to start it. Guess what, it ran another 10,000 miles until I sold for $100 bucks. I bet our camaros wouldn't take that abuse.
I had one of those in college, '79 model. Got it so hot once that the meter was past the red. Parked it for a few hours, came back for it, jumped in, pulled it into the car wash next to where I parked it, filled the radiator up with water & drove off. 6 months later, the transmission went out, motor of that slant 6 was still going strong.
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Old 05-04-2011, 11:20 PM   #55
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Alllllll I'm gonna say is this....

They spend years and millions developing the OLM system to help ensure the longevity of their engines, and reduce wasted oil/money. Don't fool yourself into believing it's a useless gimmick they put in there to "catch up with the Joneses"...It's one of the best systems out there, using a massive amount of real-time data to calculate oil deterioration.

Each vehicle has it's own unique OLMS algorithm that is tailored to that vehicles' characteristics. As long as you use the type oil that came from the factory (synthetic vs non, 5w30 v 10w30 or something)...it will be accurate, and reliable.

I find nothing wrong with keeping the old traditions in your back pocket...just don't pretend the OLMS isn't a great way to keep track of your car's vitals.
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Old 05-04-2011, 11:36 PM   #56
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Quote:
Originally Posted by franknbeans View Post
I read this post on another forum at www.bobistheoilguy.com

Good read on the "Big Bird" break down of the oil life monitoring system.
So interesting - thanks for posting!!

Quote:
Originally Posted by 1BADLS3 View Post
It's not a physical sensor that hangs out in the crankcase checking the oil as it moves throughout the engine. It's software with calculations that, in theory, predict the quality of the oil as it is inside the engine. Make sense? Call it an "oil quality forecasting tool".
This is what I do for a living with comptuers, working with software that goes in to each one's "back end" to collect statistical values so that a company can forecast what is going to happen with its IT use - and avoid problems & outages.

Would be neat if we had this for more systems on our cars than oil life. Like how many miles (or months) until I need to change the brake pads, and have On-Star make the repair appointment for me. Of course it could also do that looking at my Outlook calendar to see when I was available - and send me an e-mail when it had done so. Or can it already do that???
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Old 05-05-2011, 12:24 AM   #57
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Since mine's a fair weather vehicle, I'm just going for the oil change once a year...
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Old 05-05-2011, 01:16 AM   #58
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Would be neat if we had this for more systems on our cars than oil life. Like how many miles (or months) until I need to change the brake pads, and have On-Star make the repair appointment for me. Of course it could also do that looking at my Outlook calendar to see when I was available - and send me an e-mail when it had done so. Or can it already do that???
Or just send a repairman out to wherever my vehicle is and do the maintenance.
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Old 05-05-2011, 01:26 AM   #59
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I coulda swore I read somewhere in my paperwork that the dealer recomended every 3000 miles. I remember thinking the Mobile1 should be able to go further. Maybe it was Bonnies car...
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Old 05-05-2011, 01:44 AM   #60
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I never knew any of this whole thread UNTIL this thread. I was literally thinking every 3k miles was the deal and I was going out on my own and calling it every 5k but 'pushing' it to 6k.

This is all new to me.

I think I might want to go read my manual for MORE tidbits.
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Old 05-05-2011, 07:31 AM   #61
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Yup. I agree. How can you trust they built a good car but not trust that they know what they are doing.

I've been going about every 6k. I haven't even looked at the indicator. I probably could go further but it freaks me out. lol I've been brainwashed and it's scary to change.
PQ,

I can't imagine how the algorithms could account for being supercharged. I'd stick with the old school way....
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Old 05-05-2011, 10:36 AM   #62
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PQ,

I can't imagine how the algorithms could account for being supercharged. I'd stick with the old school way....
Name:  huh.gif
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Size:  322 Bytes Good point.

But I'm sure the ZR1 will. Hmmm..... Question for the experts maybe?
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Old 05-05-2011, 11:29 AM   #63
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I can see both sides, and while I don't argue to say that the OLM doesn't work or has flaws I prefer to change the oil religiously because I know it works. I remember a customer from when I worked at a dealership several years ago. He was a businessman, constantly on the highway and would put massive amounts of km's on his oldsmobile in short periods. He usually came in every 2 weeks at the 5000km mark and the last time I saw him, his car was approaching 500,000km.
I also have an 07 Tacoma which I've been using mobil 1 in from the first oil change and now turning 150,000km. Still seems brand new and can't tell the difference in how it runs from my friends 2010 with 30,000km.
So I believe it's up to whoever paid the money for the car to decide if they're going to use the OLM. People are going to do what they want anyways
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Old 05-05-2011, 11:40 AM   #64
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Trust me people this thing works and it saves a lot of money for those of us that have a feet of vehicles that need maintained. If your changing your oil merely based on miles in these new cars then your almost certainly waisting time and money. We have been relying on this as long as chevy had it in there vehicles and I've never had any oil related problem with any of our units. And, most of our trucks and a few cars get well over 250,000 miles on them before we unload them.
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Old 05-05-2011, 02:11 PM   #65
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Trust me people this thing works and it saves a lot of money for those of us that have a feet of vehicles that need maintained. If your changing your oil merely based on miles in these new cars then your almost certainly waisting time and money. We have been relying on this as long as chevy had it in there vehicles and I've never had any oil related problem with any of our units. And, most of our trucks and a few cars get well over 250,000 miles on them before we unload them.
Oh, I use it and love it. It saves a lot of time and money. But if I were to add a supercharger, I wouldn't trust my build to algorithms that were not designed to account for forced induction.
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Old 05-05-2011, 03:04 PM   #66
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I have always changed my oil every 2,500 miles or so. I don't see that changing any time soon. The oil may still be perfectly good but I'm not taking any chances. I recycle it anyways so no waste. I'm sure you'll be ok following the monitor.
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Old 05-05-2011, 03:31 PM   #67
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To all of you with the touch and eyesight being more accurate here's proof that it means diddly squat. A TRUE synthetic will get you much longer usage out of the oil. I would not be doing what I am doing in regards to the mileage I put on oil in my truck if it was a off the shelf brand including Mobil1. But hey, I know it comes down to what makes the individual all warm and happy feeling inside and at the same time wasting money for no reason.

27,600 miles on this oil with only one oil filter used during all those miles. I do not use a bypass oil filter either. I got my oil analysis results back last night and the oil is good for continued use. This pic was taken just before I drained the oil and took the sample. Second pic is the oil filter that was removed during this oil change.





This is from a member on one of the Dodge/Cummins websites. He had 22,500 miles on that oil and it was still good for continued use. I could post tons of different pictures of different oil colors with different amounts of miles that would make your head spin and they all could have run longer on the oil.

Last edited by NavyDood; 05-09-2011 at 08:37 PM. Reason: Added pic of cut open Amsoil Oil Filter
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Old 05-05-2011, 03:31 PM   #68
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Oh, I use it and love it. It saves a lot of time and money. But if I were to add a supercharger, I wouldn't trust my build to algorithms that were not designed to account for forced induction.
I wonder how the ZL1 will handle it?

Anyone know?

They'd have to use a different system or none at all, or the current SS system will suffice. Maybe it actually DOES account by the harder strokes and more RPMs, and air flow and such???
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Old 05-05-2011, 03:55 PM   #69
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One of the things that shocked me the most when I first moved over here from the UK was that everyone was changing their oil at 3,000 miles -
that is unheard of in the UK unless you drive the Mazda RX8 with the rotary engine.

Most people over there change at around 10,000 miles or once a year, whichever comes first, and believe it or not the side of the roads are not full of cars with seized up engines.

If changing every 3,000 miles really gives you piece of mind then do it, but it really isn't necessary. The only people who want you to believe it is are the people selling the oil.
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Old 05-05-2011, 04:04 PM   #70
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I wonder how the ZL1 will handle it?

Anyone know?

They'd have to use a different system or none at all, or the current SS system will suffice. Maybe it actually DOES account by the harder strokes and more RPMs, and air flow and such???
Stop changing the topic PQ.


No, I believe that they will program it to suit the needs of the ZL1 just like any of their other GM cars and trucks.
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Old 05-05-2011, 04:05 PM   #71
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Oh, I use it and love it. It saves a lot of time and money. But if I were to add a supercharger, I wouldn't trust my build to algorithms that were not designed to account for forced induction.
Well, when your talking about modding the motor then I would say that all bets are off as to weather or not it would be accurate.
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Old 05-05-2011, 04:51 PM   #72
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Changed my oil at 70% and about to do it again...
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Old 05-05-2011, 10:30 PM   #73
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Attachment 237261 Good point.

But I'm sure the ZR1 will. Hmmm..... Question for the experts maybe?
Quote:
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I wonder how the ZL1 will handle it?

Anyone know?

They'd have to use a different system or none at all, or the current SS system will suffice. Maybe it actually DOES account by the harder strokes and more RPMs, and air flow and such???
Yes. There are HUNDREDS of variables this system monitors (well...maybe only lots of dozens, but it's a lot...). The key here, is that each car has it's own specifically-calibrated OLMS. This is similar to how every vehicle with Magnetic Ride gets its own specific calibration.

So the ZL1's algorithm will be just as effective as the SS, or the LT...or my Cobalt's.
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Old 05-09-2011, 10:24 AM   #74
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As mentioned earlier, here is what I got in the mail on the wife's car
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Old 05-09-2011, 01:18 PM   #75
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I got the same recall on an 07 Acadia. Luckily I never followed the OLM.

I've seen plenty of those 3.6's with that problem. Probably not a coincidence that they didn't look so clean on the inside. The cams wear into the head material and when the cam sensor is so far out of line it eventually turns on the check engine light. Then you need heads, cams, timing chains, and a ton of labor.

Most engines are more robustly designed to handle oil that is a bit wore out. But when a more fragile one get's that much damage when following the OLM long oil change intervals - what does that tell you about high mileage oil?
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