01-06-2010, 11:44 AM | #1 |
ON STAR OIL Life %
So how is this number calculated? Based on their numbers I wouldn't have to get an oil change until 8000 mile range. How are they coming up with the calculation and should I ignore it and change it every 3-4000 miles?
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01-06-2010, 11:46 AM | #2 |
SoCal C5 Family Member
Drives: 2010 Camaro SS/RS - Black w/IOM; 6M Join Date: Jul 2009
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Wow! SO Many threads on this one Someone has that answer on here, and I do believe the owners manual also indicates how they calculate it. Basically, it's up to you: follow the DIC - which can go past 8000 miles!! - or, do what you're comfortable with. Me? I did mine at 1500 and will be doing it again, very soon, at 5K
You WILL get LOTS of different answers here... EDIT: From the owner's manual: Engine Oil Life System When to Change Engine Oil This vehicle has a computer system that indicates when to change the engine oil and filter. This is based on engine revolutions and engine temperature, and not on mileage. Based on driving conditions, the mileage at which an oil change is indicated can vary considerably. For the oil life system to work properly, the system must be reset every time the oil is changed. When the system has calculated that oil life has been diminished, it indicates that an oil change is necessary. A CHANGE ENGINE OIL SOON message comes on. See Engine Oil Messages on page 4-32. Change the oil as soon as possible within the next 1 000 km (600 miles). It is possible that, if driving under the best conditions, the oil life system might not indicate that an oil change is necessary for over a year. However, the engine oil and filter must be changed at least once a year and at this time the system must be reset. Your dealer/ retailer has trained service people who will perform this work using genuine parts and reset the system. It is also important to check the oil regularly and keep it at the proper level. If the system is ever reset accidentally, the oil must be changed at 5 000 km (3,000 miles) since the last oil change. Remember to reset the oil life system whenever the oil is changed.
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01-06-2010, 11:47 AM | #3 |
Drives: V45 Join Date: Feb 2007
Location: Southern California
Posts: 1,270
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It's based on all kinds of things,
number of startups, engine rpm, temperature... It's pretty in-depth but I've never been able to let mine get under 20% because I'm paranoid |
01-06-2010, 12:04 PM | #4 |
I figured that I'd get allot of answers on how comfortable a person feels about oil changing. I guess I should of checked the manual first but it still kind of vague. The engineer in me wants to see formulas
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01-06-2010, 12:42 PM | #5 |
Drives: 2010 SS/RS ABM M6 Join Date: Sep 2009
Location: East of Seattle
Posts: 85
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I like to go to 20% once break in is over. For synthetic, 10k mile oil changes seem reasonable if the OLS allows.
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01-06-2010, 12:45 PM | #6 |
Drives: Bird Join Date: Nov 2008
Location: USA
Posts: 266
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Do your first change at 500-1500 to get out all the shavings from break in, fill it with synthetic and follow the oil life monitor. From what I understand people have done matching used oil analysis and the olm has been spot on for when to change the oil.
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01-06-2010, 12:48 PM | #7 |
I changed it at the ~650 mark and I'm gonna wait til ~7000 to see what the Oil life says- right now coming up on 4000miles
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01-06-2010, 01:44 PM | #8 |
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on Stars says at current rate I won't need oil change till 11,700 miles. Thats alot. Untill this the highest I have heard a car could go was 6,000 miles between oil change. Does it take into account if you rev high alot (racing)?
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01-06-2010, 02:10 PM | #9 | |
formerly "wh0rsep0wer"
Drives: 2016 1SS Summit White Join Date: Oct 2008
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Quote:
"This vehicle has a computer system that indicates when to change the engine oil and filter. This is based on engine revolutions and engine temperature, and not on mileage." I changed my oil at 1500mi and will be following the OLS indicator. You can bet that GM did their research and has plenty of testing to validate this oil life calculation - they wouldn't risk putting their reputation for engine reliability on the line. My job deals with Preventive Maintenance optimization and using condition-based maintenance is the most efficient method and I'm sure there's still some safety factor built in to that calc.
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01-06-2010, 02:12 PM | #10 | |
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Quote:
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01-06-2010, 02:26 PM | #11 | |
7 year Cancer Survivor!
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Quote:
In most cases for the average user you can go by their oil life monitor, but if you are scared of using it, you can do as I do and change it when it gets to 50%.
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01-08-2010, 05:53 PM | #12 |
Drives: 2SS, 48 Plymouth, 77 Coup Deville Join Date: Nov 2008
Location: Warren Michigan
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Change it once a year or 35,000 miles with Amsoil 0W-30
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01-08-2010, 06:00 PM | #13 | |
Drives: Searching for 6th Gen 1LE Join Date: Nov 2009
Location: Some Strange Place Posts: 12,454
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Quote:
Regardless of my situation, that's pretty sweet... Thanks for posting that up. That sounds awful... 35,000 miles every oil change? Are you doing a engine rebuild every other oil change too? If not then you're going to have a crap load of sludge if that's what you're doing...
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04-11-2010, 12:52 PM | #14 |
Howdy! Pete here...
Drives: 2017 50th Anniv 2SS, A8, NPP, MRC Join Date: Jul 2009
Location: Schertz, TX
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I Use the DIC...
I'm using the DIC as my indicator for when to change the oil. Got my first oil change at 2900 miles. Used Mobil 1. Now I'm up to over 12,500 miles and the DIC just got to 20%. No "Service Engine Oil Soon" warning lights yet, so I'm sure I'm good. Planning an oil change this next weekend. Car is running great, and oil temps are where they always have been since I got the car, plus or minus about 10 degrees.
Depending on how hard you drive the car, you can get a lot of miles between oil changes. I feel comfortable going 10K between oil changes with the way I drive (70% highway, 30% city and rural). I think I may back off to changing it when the DIC says 25% or even 30% as the car ages, just to be safe. Hope this helps...
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