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#4455150 - 07/10/17 10:28 AM Time vs. Miles for OCI circumstance
Ddubya Offline


Registered: 09/15/16
Posts: 51
Loc: DFW, TX
Assuming I am using high quality oils (Castrol Edge EP, PPHM, or full syn MaxLife for the Caddy DTS / Castrol Magnatec Syn, PP, or PUP for the Mazda) and filters (Napa Gold, Platinum, or Fram Ultra), is there any real danger of exceeding a 1 year OCI (max would be 18 months) if I am under 10K miles between changes? Neither cars are under warranty, and I have been changing the Mazda at 7K miles and the Cadillac once per year (which equaled about 8K miles and still about 25% on the OLM). I'm thinking I could stretch the Mazda out to 1 year or 8K miles (whichever comes first) and the DTS to 10K miles or 18 months without any real concerns. Neither cars burn oil, but the Cadillac does have a minor version of "the Northstar leak", which means it leaks a little while hot/warm, but none at ambient temperatures.

The Mazda takes 5.5qts and the Cadillac 7.5qts as an FYI.

I do not currently plan on getting UOAs on either car, but I am open to the idea. I appreciate your comments/thoughts. Thank you.


Edited by Ddubya (07/10/17 10:38 AM)
_________________________
2017 Volvo S60 Inscription (Castrol Edge Syn)
2010 Mazda 6i Touring (PP or Castrol Magnatec Syn)
2013 Ford Explorer V6 (company car) (Kendall Syn Blend)
2009 Caddy DTS (Castrol EP)

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#4455163 - 07/10/17 10:39 AM Re: Time vs. Miles for OCI circumstance [Re: Ddubya]
Miller88 Offline


Registered: 04/09/08
Posts: 12703
Loc: Onondaga County
Which engine is in the Mazda 6? If it's the MZR I4, I'd have no problem going 10K on it.
_________________________
18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M

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#4455167 - 07/10/17 10:47 AM Re: Time vs. Miles for OCI circumstance [Re: Miller88]
Ddubya Offline


Registered: 09/15/16
Posts: 51
Loc: DFW, TX
Originally Posted By: Miller88
Which engine is in the Mazda 6? If it's the MZR I4, I'd have no problem going 10K on it.


I think that is the one. It's a 2.5L inline 4 which I think is kind of a Ford/Mazda mashup (same or similar to the Ford Duratech). I know Mazda is fully independent now, but I never really understood the arrangement/partnership between them and Ford at the time. The way I understand it, the generation 6 we have is mechanically a Ford Fusion, with body, interior, and suspension by Mazda. It's been a great car, and the new 6 is on my short list when it is time to replace it in 2 or 3 years.


Edited by Ddubya (07/10/17 10:50 AM)
_________________________
2017 Volvo S60 Inscription (Castrol Edge Syn)
2010 Mazda 6i Touring (PP or Castrol Magnatec Syn)
2013 Ford Explorer V6 (company car) (Kendall Syn Blend)
2009 Caddy DTS (Castrol EP)

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#4455257 - 07/10/17 12:40 PM Re: Time vs. Miles for OCI circumstance [Re: Ddubya]
E150GT Offline


Registered: 03/11/12
Posts: 1096
Loc: San Antonio, TX
I used to run 10k and even ran 13k on my 2010 Mazda 3 and had good UOA. I was using mobile 1 ep and filter
_________________________
1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 250k 5w30
2016 Mazda6 Touring 6MT - 56k 10w30

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#4455295 - 07/10/17 01:30 PM Re: Time vs. Miles for OCI circumstance [Re: Ddubya]
03s Offline


Registered: 09/21/08
Posts: 70
Loc: St. Catharines Ontario Canada
You want to stretch the DTS out to 10k miles or 18 months but the manual will say change it after a year and Mobil 1 Annual Protection says to change the oil after a year so why would you stretch it out to 18 months!
_________________________
2005 Chevrolet Optra
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#4455331 - 07/10/17 02:24 PM Re: Time vs. Miles for OCI circumstance [Re: Ddubya]
otis24 Offline


Registered: 10/30/05
Posts: 1656
Loc: South Dakota
I think Mobil1 Annual Protection states to follow manufacturers recommendations. That being said, given that the vehicles in question aren't under warranty, I would confidently run 10k with the right oil. Nor would I be afraid to exceed the one year mark with the right oil. But whereas Mobil Annual Protection places a limitation on themselves of one year, I would not want to exceed that. They know their limitations.
_________________________
1991 Chevrolet K1500 (4.3, 4x4, 86k miles)

2016 Dodge Grand Caravan
(3.6 V6) 46500 miles

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#4455339 - 07/10/17 02:31 PM Re: Time vs. Miles for OCI circumstance [Re: Ddubya]
Dyusik Offline


Registered: 09/26/14
Posts: 1982
Loc: US-WA
Oil doesn't have a wristwatch, or a calendar.
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95 Cherokee 190K DELO 10W30,XG8
07 IS250 97K FB ?w??,FULL
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#4455379 - 07/10/17 03:10 PM Re: Time vs. Miles for OCI circumstance [Re: Dyusik]
Kuato Offline


Registered: 10/23/05
Posts: 7094
Loc: Colorado
Originally Posted By: Dyusik
Oil doesn't have a wristwatch, or a calendar.


Truth has been spoken.
_________________________
Thick vs Thin test: 15k / 43k miles complete

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#4455426 - 07/10/17 04:00 PM Re: Time vs. Miles for OCI circumstance [Re: 03s]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: 03s
so why would you stretch it out to 18 months!


Because multiple used oil analysis on this site show it really doesn't matter how long the oil sits in the oil pan

It's not a perishable, like milk is
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4455438 - 07/10/17 04:16 PM Re: Time vs. Miles for OCI circumstance [Re: Dyusik]
philipp10 Offline


Registered: 05/09/14
Posts: 1173
Loc: Minnesota
Originally Posted By: Dyusik
Oil doesn't have a wristwatch, or a calendar.


oh my God....blasphemy....

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#4455444 - 07/10/17 04:24 PM Re: Time vs. Miles for OCI circumstance [Re: Kuato]
Whimsey Offline


Registered: 12/22/02
Posts: 4047
Loc: The Garden State
Originally Posted By: Kuato
Originally Posted By: Dyusik
Oil doesn't have a wristwatch, or a calendar.


Truth has been spoken.


thumbsup thumbsup thumbsup thumbsup

With my 1996 Contour, which I still have, and my 2002 F-150 I regularly ran 8,000+ OCI's in 18 to 24 month intervals and the engines were still spotless under the valve cover and the few UOA's I did showed no unusual wear metals. I used Mobil 1, Castrol Edge, Valvoline Synpower and Pennzoil Platinum. I did very little short tripping. Most of the driving was 9-10 mile trips on secondary highways with some longer distance highway driving thrown in.

Whimsey

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#4455492 - 07/10/17 05:20 PM Re: Time vs. Miles for OCI circumstance [Re: Whimsey]
Ddubya Offline


Registered: 09/15/16
Posts: 51
Loc: DFW, TX
^^

Thank you. Cool that you still have your Contour. I had a late 90s Mercury Mystique V6 that I bought used and drove for many years prior to selling it. It never left me stranded or anything like that, but it had lots of little issues that needed attention as it got older. It was a really fun car to drive, and I enjoyed it.


Edited by Ddubya (07/10/17 05:21 PM)
_________________________
2017 Volvo S60 Inscription (Castrol Edge Syn)
2010 Mazda 6i Touring (PP or Castrol Magnatec Syn)
2013 Ford Explorer V6 (company car) (Kendall Syn Blend)
2009 Caddy DTS (Castrol EP)

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#4455681 - 07/10/17 08:44 PM Re: Time vs. Miles for OCI circumstance [Re: Ddubya]
Miller88 Offline


Registered: 04/09/08
Posts: 12703
Loc: Onondaga County
Originally Posted By: Ddubya
Originally Posted By: Miller88
Which engine is in the Mazda 6? If it's the MZR I4, I'd have no problem going 10K on it.


I think that is the one. It's a 2.5L inline 4 which I think is kind of a Ford/Mazda mashup (same or similar to the Ford Duratech). I know Mazda is fully independent now, but I never really understood the arrangement/partnership between them and Ford at the time. The way I understand it, the generation 6 we have is mechanically a Ford Fusion, with body, interior, and suspension by Mazda. It's been a great car, and the new 6 is on my short list when it is time to replace it in 2 or 3 years.


Yep! That's the one! 10K on a synthetic and a good filter and don't look back!
_________________________
18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M

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#4455701 - 07/10/17 09:01 PM Re: Time vs. Miles for OCI circumstance [Re: Ddubya]
BrocLuno Offline


Registered: 09/06/15
Posts: 5516
Loc: Kalifornia Kollective
Looking at UOA data and being involved in the thread about a member who has 62,000 miles on the same AmsOil fill (with by-pass filtering) with top-ups when he changes his full flow OEM style filters (10K IIRC), I'd say it should be easy to go 10K for both those cars given the oil you are using smile
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4455728 - 07/10/17 09:36 PM Re: Time vs. Miles for OCI circumstance [Re: otis24]
Coprolite Offline


Registered: 07/03/11
Posts: 1224
Loc: Houston, TX
Originally Posted By: otis24
. But whereas Mobil Annual Protection places a limitation on themselves of one year, I would not want to exceed that. They know their limitations.



No

I bet it would be fine for more than a year. Since the are calling it AP, the are only warrantying it for a year. If warrantying is even a word. I don't think their issue is lack of longevity, rather they don't want people trying to run it forever and then suing them for not saying to change oil.

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