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#4680064 - 02/27/18 09:19 PM Should I change my oil??
buck91 Offline


Registered: 04/17/12
Posts: 2449
Loc: West Michigan
So I know this has come up before on bitog but I just canít decide what I should do. Getting some spring fever so Iím getting my mustang ready for ragtop season. Last oil change was last February or March. But that was also only 1600 miles ago. It was a Dino (havoline HM 5w30 I believe) with a MC FL820s filter. Obviously the car doesnít get driven a whole lot but I try to take it or, maybe to work a few times a week when itís nice out. Generally gets driven a bit on the rough side. Oil on the dip stock looks nice, like it is clean still.

As far as I know the big arguement to change the oil is possibly decrease Tbn from sitting all winter with acid and products of combustion. Also some possible water contamination from condensation and the polymerizing of some parafins or other waxes in the base stock. Not too worried about the cost of a change but if there is really no reason to do so then I wonít. If there really is, I will.

Thoughts?
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2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop

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#4680075 - 02/27/18 09:30 PM Re: Should I change my oil?? [Re: buck91]
WANG Offline


Registered: 01/08/08
Posts: 546
Loc: North Carolina
UOA, man.
It's probably fine, but with a UOA you would have some science to confirm or deny that opinion.
I've kept oil in service for long time stretches and low mileage emboldened by UOAs.


Edited by WANG (02/27/18 09:31 PM)
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#4680087 - 02/27/18 09:38 PM Re: Should I change my oil?? [Re: buck91]
madeej11 Online   content


Registered: 06/22/15
Posts: 114
Loc: montreal ,canada
Give it a couple of good runs to get rid of contaminants and keep it in there. It'll be fine, don't waste good oil.

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#4680101 - 02/27/18 09:57 PM Re: Should I change my oil?? [Re: madeej11]
das_peikko Offline


Registered: 01/01/18
Posts: 521
Loc: San Antonio, TX
Originally Posted By: madeej11
It'll be fine, don't waste good oil.

^^^ That's the most widely accepted popular answer right there.

If you have less than 5000 miles on the oil and you're wanting to drain it, keep it to yourself and forever hold your peace. spank

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#4680116 - 02/27/18 10:23 PM Re: Should I change my oil?? [Re: WANG]
CT8 Online   content


Registered: 10/09/14
Posts: 11017
Loc: Idaho
Originally Posted By: WANG
UOA, man.
It's probably fine, but with a UOA you would have some science to confirm or deny that opinion.
I've kept oil in service for long time stretches and low mileage emboldened by UOAs.
For the cost of a uoa change the oil.
_________________________
"Don't let your preconceived notions get in the way of facts."
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#4680118 - 02/27/18 10:26 PM Re: Should I change my oil?? [Re: buck91]
aquariuscsm Online   content


Registered: 12/30/06
Posts: 18182
Loc: Dallas,Tx USA
Been in there for a year? I'd change it.
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#4680129 - 02/27/18 10:51 PM Re: Should I change my oil?? [Re: CT8]
das_peikko Offline


Registered: 01/01/18
Posts: 521
Loc: San Antonio, TX
Originally Posted By: CT8
For the cost of a uoa change the oil.

But then there's still the slight chance of wasting good oil. You're better off spending the $20 for the UOA so you can save the $10 in oil.

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#4680130 - 02/27/18 10:51 PM Re: Should I change my oil?? [Re: buck91]
zeng Offline


Registered: 09/01/15
Posts: 2189
Loc: Malaysia
1600 miles ? Keep the dino.
You may consider FOC blotter spot test.

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#4680140 - 02/27/18 11:16 PM Re: Should I change my oil?? [Re: buck91]
Dyusik Offline


Registered: 09/26/14
Posts: 1984
Loc: US-WA
duh
It's sub 2k mi, how much degradation can oil go through in that period?
I'm not here asking if I should change my 3 year old oil in the Jeep because that would still be a silly question to ask.
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#4680150 - 02/27/18 11:40 PM Re: Should I change my oil?? [Re: aquariuscsm]
Trav Offline


Registered: 11/20/06
Posts: 18909
Loc: MA, Mittelfranken.de
Originally Posted By: aquariuscsm
Been in there for a year? I'd change it.


Same here, I don't overthink such things and I wouldn't spend money on a UOA for this oil and usage.
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#4680157 - 02/27/18 11:53 PM Re: Should I change my oil?? [Re: buck91]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1771
Loc: Alberta
I donít think oil sitting in the oil pan degrades at all. If you think it does, go get a bucket, pour your used oil in it. Have a UOA done. Leave it the equivalent time as your winter hiatus. Do a UOA. There wonít be a difference.

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#4680172 - 02/28/18 12:18 AM Re: Should I change my oil?? [Re: buck91]
dishdude Offline


Registered: 11/14/08
Posts: 8759
Loc: Phoenix
No UOA needed. Oil with only 1600 miles on it that hasn't even been in the sump a year is fine. All you need to do is drive
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2018 Challenger SRT

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#4680231 - 02/28/18 05:08 AM Re: Should I change my oil?? [Re: buck91]
KL31 Offline


Registered: 06/03/16
Posts: 549
Loc: South OZ
Having driven a car for almost 18 months and then UOA'ing, I can confirm TBN is still good.

There's some threads here where users have kept low mileage oil in their engines for 5 years and UOA comes back good.

I've yet to see an extended oil change interval with time being the only factor come back with bad results. It will be fine almost certainly. I mean maybe if you left it under 6 feet of snow for the whole time, maybe that would be an issue. But garaged, no problemo.
_________________________
95 MX-3 2.5L|Shell Helix Ultra 5W40|Wix 51356
04 Focus 1.8L|Wesfil Cooper WZ63|Valvoline MST 5W30
05 Kluger 3.3L|Wesfil Cooper WZ418|Magnatec 10W30 Semi Syn

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#4680247 - 02/28/18 05:40 AM Re: Should I change my oil?? [Re: das_peikko]
SilverSnake Online   content


Registered: 05/29/13
Posts: 592
Loc: Florida
Originally Posted By: das_peikko
But then there's still the slight chance of wasting good oil. You're better off spending the $20 for the UOA so you can save the $10 in oil.


This about sums it up.
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2016 Charger, 6.4L-485 HP (PUP 0W-40)
2017 BMW 330i, 2L-248 HP (BMW 0W-20)
2018 Jeep GC, 5.7L-360 HP (PUP 5W-20)
2008 20KW Generac (Amsoil 10W-30/30)

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#4680249 - 02/28/18 05:42 AM Re: Should I change my oil?? [Re: buck91]
IndyFan Offline


Registered: 06/16/05
Posts: 569
Loc: Danville, Indiana
Where are you getting a UOA for 20 bucks? Blackstone charges $28.
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