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#2415746 - 10/25/11 12:00 PM Time (not mileage) between oil changes
Q451990 Offline


Registered: 12/21/08
Posts: 55
Loc: Columbia, SC
I can't imagine this hasn't been discussed before - but I couldn't find anything using the search function. If anyone could direct me to some good threads, I would appreciate it.

I know the old rule of thumb is 3 months between oil changes, but with today's advanced oil chemistry - what is a realistic time period between oil changes?

The reason I ask, is that my car has become sort of a garage queen. I put maybe 3K per year on it. Last year was less than 2K. So how long can I leave oil in it without it breaking down? I'm using M1 0W-30 with an M1 filter, and traditionally change the oil every 4000 to 4500 miles, but at this rate that could mean two years between changes!

Thanks!

Heath
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1990 Infiniti Q45 - M1 0W-30
2005 Infiniti G35 Sedan - M1 0W-30
2004 Nissan Frontier - PP 5W-30

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#2415752 - 10/25/11 12:08 PM Re: Time (not mileage) between oil changes [Re: Q451990]
wkcars Offline


Registered: 07/06/11
Posts: 567
Loc: Kansas

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#2415753 - 10/25/11 12:10 PM Re: Time (not mileage) between oil changes [Re: Q451990]
Anies Offline


Registered: 01/29/09
Posts: 2740
Loc: NJ
I think its safe to say that you follow your owners manual and/or OLM.


Typically its 12 months max(if warrantied) for an oil change(pending make/model). If you have a garage queen that's rarely driven then I think you can follow that rule. if its extreme short trip driving daily then you would of course want to change it more often.



Edited by Anies (10/25/11 12:10 PM)
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#2415755 - 10/25/11 12:11 PM Re: Time (not mileage) between oil changes [Re: Q451990]
chubbs1 Offline


Registered: 06/09/10
Posts: 4574
Loc: Merritt Island FL, USA
1 year is easy and safe. Don't push it past that, there is no point.
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#2415787 - 10/25/11 12:38 PM Re: Time (not mileage) between oil changes [Re: chubbs1]
Hallmark Offline


Registered: 10/28/10
Posts: 830
Loc: Pacific Northwest
Most/many new OMs specify XXXX miles not to exceed one year for 'normal' driving. I would think 'little to no' driving in the period of a year would qualify for a 12 month OCI.

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#2415803 - 10/25/11 12:52 PM Re: Time (not mileage) between oil changes [Re: Q451990]
Solarent Offline


Registered: 10/24/11
Posts: 463
Loc: Calgary AB
M1 isn't going to break down in terms of oil stability for several years. but based on what I assume is a bunch of short trips and long wait periods between driving your main concern will be moisture buildup and overall oil acidity.

I would say change it every 12 months minimum - depending on driving conditions and environment. You probably won't do any damage by keeping it for 18 months, but 12 is your safe bet.

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#2415807 - 10/25/11 12:55 PM Re: Time (not mileage) between oil changes [Re: Q451990]
Quattro Pete Offline


Registered: 10/30/02
Posts: 26507
Loc: Michigan
2 years shouldn't be a problem as long as you're not short tripping it and letting the oil fully warm up whenever you take it out for a ride.
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#2415843 - 10/25/11 01:20 PM Re: Time (not mileage) between oil changes [Re: Q451990]
HTSS_TR Offline


Registered: 04/17/06
Posts: 13116
Loc: Irvine, CA
I agree with Pete, 2-3 years with quality synthetic oil and high end filter is not a problem if most trips are 15-20 miles or longer.
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#2415864 - 10/25/11 01:31 PM Re: Time (not mileage) between oil changes [Re: chubbs1]
Radman Offline


Registered: 11/24/10
Posts: 485
Loc: Detroit, Michigan
Originally Posted By: chubbs1
1 year is easy and safe. Don't push it past that, there is no point.


I agree with Chubbs. Storing acidic oil in your engine longer than a year will increase corrosion. My garage queen gets 3-4K per year and fresh oil just before it is stored for the salty Michigan Winters.
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#2415869 - 10/25/11 01:34 PM Re: Time (not mileage) between oil changes [Re: chubbs1]
stephen9666 Offline


Registered: 12/08/06
Posts: 2639
Loc: USA
Originally Posted By: chubbs1
1 year is easy and safe. Don't push it past that, there is no point.


+1

I rarely drive my Nissan Frontier anymore, so it's now on a one year oil change interval.

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#2415873 - 10/25/11 01:36 PM Re: Time (not mileage) between oil changes [Re: Radman]
Quattro Pete Offline


Registered: 10/30/02
Posts: 26507
Loc: Michigan
Originally Posted By: Radman
Storing acidic oil in your engine longer than a year will increase corrosion.

If it does, it surely hasn't been evidenced by elevated metals on UOAs we've seen of oil that's been in service for 2 years or so.

If the additive pack hasn't been depleted, the oil should not be acidic.
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#2415904 - 10/25/11 01:58 PM Re: Time (not mileage) between oil changes [Re: Quattro Pete]
Solarent Offline


Registered: 10/24/11
Posts: 463
Loc: Calgary AB
Originally Posted By: Quattro Pete

If the additive pack hasn't been depleted, the oil should not be acidic.


agreed. acidity may increase with excess moisture and time but shouldn't be a serious problem.

as Pete said in his first reply: as long as you aren't short tripping and allow the oil to get to full operating temp [so the additive pack can do its job] you should be fine.

if you are making lots of short trips 12-18 months would be my safe max. I always put fresh oil in anything that will be stored for 3 months + (but thats more so I don't forget to change it later).

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#2415909 - 10/25/11 02:04 PM Re: Time (not mileage) between oil changes [Re: Quattro Pete]
ChrisD46 Offline


Registered: 09/10/10
Posts: 1235
Loc: GA.
What if for a short tripper running 2 ~ 5 miles at a time daily without the oil rarely coming up to temperature ? Would you still do a 12 month OCI or drop back to something like 6 months OCI ?

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#2415915 - 10/25/11 02:09 PM Re: Time (not mileage) between oil changes [Re: Q451990]
Quattro Pete Offline


Registered: 10/30/02
Posts: 26507
Loc: Michigan
Quote:
What if for a short tripper running 2 ~ 5 miles at a time daily without the oil rarely coming up to temperature ? Would you still do a 12 month OCI or drop back to something like 6 months OCI ?



Excess moisture will quickly deplete the add pack. I'd probably do a UOA at 6 months to see how things are going, and proceed based on that.
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'15 Q5 3.0T
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#2415918 - 10/25/11 02:14 PM Re: Time (not mileage) between oil changes [Re: ChrisD46]
Solarent Offline


Registered: 10/24/11
Posts: 463
Loc: Calgary AB
Originally Posted By: ChrisD46
What if for a short tripper running 2 ~ 5 miles at a time daily without the oil rarely coming up to temperature ? Would you still do a 12 month OCI or drop back to something like 6 months OCI ?


I agree with Pete, do a UOA at 6 months and see how your additives are sitting. If you need a comparison check out some of the UOA posted here.

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