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2006 DTS
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26 Posts
Discussion Starter #1
So I been following the computer in the car on when to get my oil change. Here we are a little over 10,000 miles. CHANGE OIL SOON comes up. Is this normal or should say screw the computer and work out my own schedule...
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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68,551 Posts
The OLM is uncannily accurate. If you're a suburban/rural /highway driver you can take it as gospel. Whatever it says - and the owner's manual usually amplifies that, when the change oil message shows, do it within the next two tanks of gas.

For more insight, please study the entire Cadillac Technical Archive way up ^^^ in the top black bar. It was written by one of the Northstar powertrain engineers and the OLM section was written by the engineer who developed and verified the algorithms.

Using modern oils and unleaded gasolines an engine can go FAR longer between oil/filter changes. I drive my 2002 less than 5,000 miles a year, so I change oil/filter each April or so. It leaks not one drop of oil and gets over 6,500 miles per quart. Oil sample tests from Blackstone Labs come back with essentially no wear traces.

Study your manual on how to reset the OLM at oil change.
 

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Registered
2006 DTS
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26 Posts
Discussion Starter #3
Thanks for the advice. I'll definitely read that article you mentioned. My main concern was i won't actually be able to change the oil until Monday and I need to drive today....
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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68,551 Posts
The OLM has a huge safety factor built in - you'll find out from the articles - but it uses a LOT of car/engine operating info to calculate oil life - it's nowhere near just "time/mileage". Nowhere near.

I'll bet that, if you pull your (engine) dipstick right now the oil on it looks sort of dusky amber.

FWIW, an engine receives more wear in two weeks of city driving than it does during a 2500 mile round trip from NY - FL and back. The OLM would decrease LESS on a NY - CA run than in a few weeks of city driving, too.

Post #1 of this thread link contains an interesting TSB (Technical Service Bulletin) - but what you want to know right now is at the very bottom of P.2 and top of P.3.

http://www.cadillacforums.com/forums/northstar-engines-system-technical-discussion/198220-northstar-ring-cleaning-procedure-proper-oil.html
 
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