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Old 06-24-2011, 05:43 PM   #99
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Quote:
Originally Posted by SilverTurtle View Post
there are a multitude of problems and situations that the OLM will NOT test for... one of them is a failing oil filter... another is a leaking gasket or journal going bad... nothing in the algorithm will test for these problems, and that is why I change my oil between 3,000 and 5,000 miles... its just a safety precaution to make sure that I take the best possible care of the vehicles that I drive... does it cost more? sure... is it worth it? ABSOLUTELY.

everyone and their little brother can use the OLM to change their oil and save the planet... but I will change my oil when I see fit to do so, and my cars will run better because of it.

and our cars that only travel 200-500miles per year all get annual oil changes, whether they need it or not is irrelevant
Any of the scenarios you are referring to could happen if you changed your oil every 500 miles. There is ZERO proof that your car will run better because you change your oil every 3000-5000 miles.
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Old 06-24-2011, 06:01 PM   #100
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helpful post but I ride the old girl pretty hard. so I'll just stick with checking the condition and deciding. I use royal purple and change out once a season, about 3500.
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Old 06-24-2011, 06:49 PM   #101
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"The oil life monitor is so effective because: it is customized for that specific vehicle/engine"

So according to the article, does this mean that modifying the car, say by adding an intake, would affect the OLM calibration?
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Old 06-24-2011, 07:10 PM   #102
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Quote:
Originally Posted by NavyDood View Post
Any of the scenarios you are referring to could happen if you changed your oil every 500 miles. There is ZERO proof that your car will run better because you change your oil every 3000-5000 miles.
so, lets say that an oil filter goes bad at 1,000 miles... by your logic, it wouldn't be any worse for me to go until the OLM says that I should change it at 8,000 or 10,000 miles than it would be for me to change the oil and discover that the oil filter had gone bad at 3,000 miles... I'm sorry, but it is YOUR logic that is flawed and there is ZERO proof that backs up your side of the story... I'm sure that I could find any number of reports (or just use some common sense) that says that running an engine with a bad oil filter or failing part for longer than absolutely necessary is a bad idea... can you prove the contrary?

do not presume that just because you FEEL something is right, that it IS right... until there is something that actually tests the oil while it is in the car, preventative maintenance will be the best way to keep your car running at peak performance... feel free to gamble with your engine all you want... I will take the safer route and know exactly what is going on with mine.
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Old 06-24-2011, 07:45 PM   #103
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had the oil changed last september and forgot to reset the OLM , been 2K and it still reads 75%. will probably wait till it is 5K in or it is down to 25% which ever comes first. Don't drive her much in the winter, maybe less than 50 miles from nov to march.
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Old 06-24-2011, 08:00 PM   #104
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So I guess this might be the right thread. Have about 5000 miles, probably only 1500 since my last oil change, but it's been over a year. Figured it was time and went to drain the oil today and no where near 8 quarts drained out. I did remove the cap and car was lifted to the drain side. The only thing I could think of was the oil had sludged up in the pan over the winter. To see if that was the case, I put in the regular 8.9 quarts and the stick showed way too much oil, about 3 inches over the hashmarks. Do you think synthetic on such a low mileage could sludge up like that? If so, should I drain the oil to the correct amount, run it for about a week or two to break up the sludge, and do another oil change? Yes, I know I need to drive the car more often....
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Old 06-24-2011, 08:01 PM   #105
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Originally Posted by Man1acs View Post
So, what I guess I still don't understand is, it will even calculate when you need a oil change even if you use synthetic oil. I wonder if you switched from synthetic to conventional oil would the system still be accurate and visa verse? I might start paying attention to this system now in my Camaro, I never have before.
I would assume its calibrated for whatever oil is recommended in the owners manual, since there isn't an on-board chemistry set to determine what type of oil you put in.
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My sister's dentist's brother's cousin's housekeeper's dog-breeder's nephew sells coffee filters to the company that provides coffee to General Motors......
........and HE WOULD KNOW!!!!
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Old 06-24-2011, 08:27 PM   #106
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I bought my TB SS brand new in 06 and have followed the OLS from day one. 5 years and 103K miles later it's still going strong with no problems. Here is additional info on the system.
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Old 06-24-2011, 09:23 PM   #107
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helpful post but I ride the old girl pretty hard. so I'll just stick with checking the condition and deciding. I use royal purple and change out once a season, about 3500.
Absolutely nothing wrong with what you are doing.

Quote:
Originally Posted by Croathlete View Post
So I guess this might be the right thread. Have about 5000 miles, probably only 1500 since my last oil change, but it's been over a year. Figured it was time and went to drain the oil today and no where near 8 quarts drained out. I did remove the cap and car was lifted to the drain side. The only thing I could think of was the oil had sludged up in the pan over the winter. To see if that was the case, I put in the regular 8.9 quarts and the stick showed way too much oil, about 3 inches over the hashmarks. Do you think synthetic on such a low mileage could sludge up like that? If so, should I drain the oil to the correct amount, run it for about a week or two to break up the sludge, and do another oil change? Yes, I know I need to drive the car more often....
8.9 qts is too much. It is only 8 qts with the filter.

Quote:
Originally Posted by DGthe3 View Post
I would assume its calibrated for whatever oil is recommended in the owners manual, since there isn't an on-board chemistry set to determine what type of oil you put in.
Exactly

Quote:
Originally Posted by SilverTurtle View Post
so, lets say that an oil filter goes bad at 1,000 miles... by your logic, it wouldn't be any worse for me to go until the OLM says that I should change it at 8,000 or 10,000 miles than it would be for me to change the oil and discover that the oil filter had gone bad at 3,000 miles... I'm sorry, but it is YOUR logic that is flawed and there is ZERO proof that backs up your side of the story... I'm sure that I could find any number of reports (or just use some common sense) that says that running an engine with a bad oil filter or failing part for longer than absolutely necessary is a bad idea... can you prove the contrary?

do not presume that just because you FEEL something is right, that it IS right... until there is something that actually tests the oil while it is in the car, preventative maintenance will be the best way to keep your car running at peak performance... feel free to gamble with your engine all you want... I will take the safer route and know exactly what is going on with mine.
So, what what you are saying is if a filter goes bad at 1000 miles and you keep running your oil for another 2000-4000 miles after the filter failure (because you will have no idea it failed), that is ok because you are changing your oil on a lessened interval? It doesn't matter if you find that bad filter 10 miles later. The damage has started. Oil filter failures are not new news. There are plenty of pics posted around the forums in cyberworld of cut open filters that are distorted, very poorly built or with holes in the media which would include new filters too. Sorry, but you personally will not know what exactly is going on inside your engine just because you change your oil more often. Let me guess, you still believe sight and smell have some kind of validity in your oils condition too?

Dood, we can talk in circles all day about this. Any OCI can be considered flawed whether it is every 2500 miles, every 10,000 miles, by the OLM, once a year etc... The "safer" route you are taking with a 4th gen might make a little more sense since the newer OLM programming has more data research in it from past years and today's oils are much better than the oils of just three years ago. As for the testing the oil in the car, it is coming in the near future even though it will be rather basic. There is no way they will be able to implement ICP (inductively-coupled plasma), infra-red light, viscosity, hydrolosis and chemical reaction testing methods. The most I see happening is a real time viscosity monitor that would supplement the OLM algorithm making OLM's more refined/accurate.

I would have zero issues running 15,000 miles between intervals in my camaro as long as I ensured I used a good oil filter. The only oil filter I would trust that distance is a Amsoil Ea15K50. Other wise I would change a regular filter at the half way point or at each third.

I guess only doing four oil changes on my truck in a little over 100,000 miles with an oil analysis at each oil change to back up my OCI means nothing and I should just throw the truck away because it is a ticking time bomb.

Last edited by NavyDood; 06-24-2011 at 09:36 PM.
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Old 06-24-2011, 09:38 PM   #108
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When your looking at a used car, would you rather buy one from someone who changes the oil religiously every 3K. Or one that goes to 0%?

Experienced eyes can tell a lot by looking at the dipstick. What's one of the first thing a sharp used car buyer does? Pop the hood, pull the dipstick. Nice and clean, probably well maintained. Nasty, black as tar, probably some gunk in that motor and an owner that waited till the light came on or longer.

Ever been a recall to lower the oil change interval below 3K? Nope.

Ever been an OLM recall to shorten the oil change intervals because of potential engine damage? Yes.

Case closed.
Or the used car lot changed the oil in it right before they parked it in the lot....... just sayin
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Old 06-24-2011, 10:10 PM   #109
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awesome thread, a lot of good comments. i can proudly say im one of those peace of mind kind of people. i even did the old school break in process, did 561 miles and got the regular oil out and had the dealer switch me to mobil 1, then i did a pretty good break in after that, varying the rpms and getting more comfortable with a manual and changed it again at 2801 right before the BBOMG canada trip. Then i put a performance if you want to call it that run on it (7,000 rpm clutch dump video) and ran it to the rest of the year and when i got out of storage this year i changed it again at 5318.

Im currently at 5,700 and reading this it gives me the confidence to run longer, and the money savings is a bonus as well. I just recently bought a 08 G8 GT with 32,000 and i just changed it for piece of mind not knowing when its been changed last and ill defiantly go to at least 6,000 on both vehicles now bc its 8.8 quarts for the G8 and 6 quarts for the camaro plus oil filter (AcDelco is the only filter ill use now after seeing cut aways at college, goodbye Fram) add up in the end.
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Old 06-25-2011, 02:16 AM   #110
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THe bastards here (GM Dealers) insist to change the Oil every 3,125 miles (5,000k/m)!! But thanks for the post anyway

Cheers
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Old 06-25-2011, 02:40 AM   #111
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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.
apparently the old time "mechanic's rule" of changing the oil when it starts to change "color" on the "stick" no longer applies?..the "'reasoning" of the old time mechanics was simple!.."when the oil changed color at the dip stick, ,this meant the oil was already "dirty" and these molecules of dirt were circulating inside the engine,wearing it out. this "procedure" was dependent on the oil turning color when checked at the dipstick,and NOT by utilizing a time,OR a mileage interval.in other words,the TIME to CHANGE the oil was whenever it started to change 'color at the stick when checked!...of course,on a further note,it became impractical,OVER TIME to do this,and this is how we ended up with a mileage,AND or time interval to know WHEN to change the oil!...just sayin!
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Old 06-25-2011, 03:24 AM   #112
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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.
Quote:
Originally Posted by SilverTurtle View Post
so, lets say that an oil filter goes bad at 1,000 miles... by your logic, it wouldn't be any worse for me to go until the OLM says that I should change it at 8,000 or 10,000 miles than it would be for me to change the oil and discover that the oil filter had gone bad at 3,000 miles... I'm sorry, but it is YOUR logic that is flawed and there is ZERO proof that backs up your side of the story... I'm sure that I could find any number of reports (or just use some common sense) that says that running an engine with a bad oil filter or failing part for longer than absolutely necessary is a bad idea... can you prove the contrary?

do not presume that just because you FEEL something is right, that it IS right... until there is something that actually tests the oil while it is in the car, preventative maintenance will be the best way to keep your car running at peak performance... feel free to gamble with your engine all you want... I will take the safer route and know exactly what is going on with mine.
100% correct! why gamble?..pull 'em (oil & filter) at no more than 5,000 miles and sleep very well at night!..i use conventional (dino) in mine,and yank it at 5,000 miles!..f**k synthetic!.never used it!..never will!..not needed,because i get it out at 5,000 miles on all my cars!..NEVER,EVER had any kind of engine related issues at all,and i have driven just about everything made over 45 years!.(oil monitoring system?) (lol!) he! he! he!
what's that?..just sayin!
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