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Going over 12 months on OCI #5378558 03/17/20 11:24 AM
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avacado11 Offline OP
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My Maserati Ghibli doesn’t get driven much. Last oil change was April 2019, have only logged 5k miles since. Mobil 1 5W40 FS with OEM oil filter. Factory interval is 12500 miles/12 months.

Due to this virus, I don’t have time to do an oil change on it. My dad still drives the car around every once in a while to keep everything moving. At this point, it looks like I prob won’t be able to change until June-July, 2-3 months overdue.

Is this too risky? Last time 2 times I saw a car go over 12 months OCI it blew piston rings, but they also did a WOT acceleration prior. I’d like to do it myself but worse case I’ll have my dad take it to a shop. Just don’t trust anybody working on my car after the last incident.


2017 Subaru Outback
2014 Lexus IS250F
2014 BMW i3
2014 Maserati Ghibli S Q4
Re: Going over 12 months on OCI [Re: avacado11] #5378560 03/17/20 11:30 AM
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walterjay Offline
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If you're not out on the track I see no problem here at all. I have had several vehicles that went for two years before changing oil and no issues.

Re: Going over 12 months on OCI [Re: avacado11] #5378573 03/17/20 11:41 AM
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zzyzzx Offline
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More than one year is no a problem. Project Farm did a video on this. I go strictly on mileage.

Re: Going over 12 months on OCI [Re: avacado11] #5378574 03/17/20 11:41 AM
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Quattro Pete Offline
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I don't see any problem going a few months over.


2002 530i   2015 Q5 3.0T   2018 Charger SRT
Re: Going over 12 months on OCI [Re: avacado11] #5378592 03/17/20 12:03 PM
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Cujet Offline
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I agree, under most circumstances, there is no reason to change oil based on the calendar. Today's quality oils contain sufficient additives to combat acids, and they will do so for many years. It's not unusual for TBN of a quality oil

However, I'd like to 'drift' the thread and address the very long oil change interval of 20,000KM or 12,500 miles. Unless an engine sump contains 12 or 15 liters/quarts, the oil will be sufficiently contaminated with particulates, engine blow by, unburned fuel and evaporated unburned fuel residue.

The Europeans are well known for extending oil change intervals into the stratosphere, for environmental reasons, with little regard to engine life, sludge, particulate load or other related issues. Many high end cars are leased, and in this environment, it's beneficial to the lessee and the manufacturer to include 'free' and infrequent service.

We have a large number of exotic cars here in South Florida. Many of which end up for post-lease sale at known outlets. There is a pattern of sludge, timing chain problems, and repairs that come with this type of near-neglect.

I suggest 5000 miles is a near ideal interval, using a quality synthetic oil. I do this. It's also amazingly easy to remember, as I change oil at 10,000 + 15,000 + 20,000 etc. Maybe change the filter every other oil change.

Last edited by Cujet; 03/17/20 12:06 PM.

People who count on their fingers should maintain a discreet silence.
Re: Going over 12 months on OCI [Re: avacado11] #5378602 03/17/20 12:10 PM
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IndyIan Offline
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As long as the oil gets up to temperature for a while when its driven, it should be fine. Idling 2 miles to the store and back isn't really helping as its getting more fuel and condensation into the oil without getting hot enough to evaporate anything.


06 Focus ZXW, 5spd manual, 220km
18 Outback 2.5 CVT 35km 0W20
Re: Going over 12 months on OCI [Re: avacado11] #5378618 03/17/20 12:23 PM
Joined: Oct 2010
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Astro14 Offline
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I’ve got the same problem with my S600. I don’t drive a lot in the 12 month/10,000 mile oil change interval.

So, I go beyond the 12 months, until I get closer to the 10,000 miles. I run Mobil ONE 0W40.

Used oil analysis has shown that the oil is still good after 18 months in the sump. I’m sure it’s good longer than that.

So, to answer your question: no risk.


32 Packard 15W40
01 Volvo V70 T5 0W30 AMSOIL SS
02 Volvo V70 T5 0W30 Edge
02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 5W30 Pennzoil Ultra
Re: Going over 12 months on OCI [Re: avacado11] #5378620 03/17/20 12:26 PM
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Calikura Offline
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It really depends on the nature of those occasional drives. Besides the length of the drives and getting the engine to temperature, start-stop traffic is pretty hard on oil so I wouldn't go more than a couple of months over if the car is subject to a lot of that.

Re: Going over 12 months on OCI [Re: avacado11] #5378630 03/17/20 12:40 PM
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Lubener Offline
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I usually go 3 years on a garage queen which is lucky to have 3-4 k miles on the oil after three years.


The "thinking" man's friend.
Re: Going over 12 months on OCI [Re: Calikura] #5378635 03/17/20 12:48 PM
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kschachn Offline
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Originally Posted by Calikura
It really depends on the nature of those occasional drives. Besides the length of the drives and getting the engine to temperature, start-stop traffic is pretty hard on oil so I wouldn't go more than a couple of months over if the car is subject to a lot of that.

Absolutely. There's a big difference between driving a car for two miles every other day for a year and accumulating 365 miles, and a person driving twice in that year for the same amount of miles. The one and only 1MZ-FE I personally saw with sludge was one where it was driven as I describe in my first example.


1994 BMW 530i, 252K
1996 Honda Accord, 288K
1999 Toyota Sienna, 434K
2000 Toyota ECHO, 284K
Re: Going over 12 months on OCI [Re: avacado11] #5378643 03/17/20 12:57 PM
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Ihatetochangeoil Offline
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Been a few years ago; this guy went 5 years but only a few thousand miles and did a UOA, his results were so typical it was boring. You may find it interesting he used M1 but 10W-30. https://www.bobistheoilguy.com/foru...surburban-big-block-m1-10w-30-5-year-oci

I don't think the link to his UOA works anymore, nevertheless you may find reading the thread fascinating. Pull quote from the guy who did it: "My takeaway from this report is...if you're using a quality synthetic and don't drive much with a garage kept car, annual oil changes are likely a waste of time, money and resources."

Re: Going over 12 months on OCI [Re: Cujet] #5378652 03/17/20 01:06 PM
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supton Offline
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Originally Posted by Cujet
The Europeans are well known for extending oil change intervals into the stratosphere, for environmental reasons, with little regard to engine life, sludge, particulate load or other related issues.

My opinion is that it kinda makes sense--they drive less miles per year and scrap their vehicles sooner. Why not do the least amount of work if you know with near-certainty when it will be pushing up weeds?

I too also like 5k OCI's although if I miss the 5k mark I sleep just fine letting it go to 10k so as to be back on schedule.


2011 Toyota Camry, base, 2.5L/6MT, 203k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 158k, ours
1999 Toyota Camry LE, 2.2L/4AT, 223k, his
Re: Going over 12 months on OCI [Re: avacado11] #5378784 03/17/20 03:36 PM
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Dinoburner Offline
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The 77 in my sig has 3 years on Castoroil muscle car oil and about 3k miles. Might change it out to T6 this spring.


77 Chev stepside 454 Casteroil syn
95 GMC 4wd mobil syn
2016 Equinox LTZ V6 dealer
Kubota L5030 T6
Re: Going over 12 months on OCI [Re: supton] #5380213 03/19/20 09:59 AM
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Cujet Offline
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Originally Posted by supton
Originally Posted by Cujet
The Europeans are well known for extending oil change intervals into the stratosphere, for environmental reasons, with little regard to engine life, sludge, particulate load or other related issues.

My opinion is that it kinda makes sense--they drive less miles per year and scrap their vehicles sooner. Why not do the least amount of work if you know with near-certainty when it will be pushing up weeds?

I too also like 5k OCI's although if I miss the 5k mark I sleep just fine letting it go to 10k so as to be back on schedule.


They are not immune to the problem. My European friends were all on the long OCI interval, until this started happening.


[Linked Image from blog.bavauto.com]

A correction for my earlier post, as I cannot edit it:
Originally Posted by Cujet
. It's not unusual for TBN of a quality oil
Apologies for the incomplete thought. The TBN of quality oils is high enough to safely combat acids for many years of infrequent use.

Last edited by Cujet; 03/19/20 10:02 AM.

People who count on their fingers should maintain a discreet silence.
Re: Going over 12 months on OCI [Re: avacado11] #5380237 03/19/20 10:31 AM
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supton Offline
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Not saying they were immune--I'm of the opinion, what good is sending a spotlessly clean engine to the junkyard? If it will be in the junkyard before 100k regardless, then why not save on a couple oil changes?

[I change mine often as I plan on the long haul, and it feels good, but if I wanted to save a few bucks and was going to get rid of in short order, then what do I care what the engine looks like? Just that it met my anticipated needs.]


2011 Toyota Camry, base, 2.5L/6MT, 203k, hers
2010 Toyota Tundra DC, 4.6L/6AT, 158k, ours
1999 Toyota Camry LE, 2.2L/4AT, 223k, his
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