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#4753471 - 05/10/18 08:40 PM Determining Severe Oil Service
CincyFritz Offline


Registered: 07/01/08
Posts: 6
Loc: Ohio
Have a Subaru Legacy 2.5l and have 1500 miles on it in 3 months. Would you change oil per the Severe service due to low mileage/short trip schedule? It is driven 8 miles to work weekly (Mo-Fr)one way, some interstate and mostly side streets. The dealer says just do 6months/6000miles (WECF). What do YOU think? Thanks for your comments in advance. I want to use QSUD 0W-20 especially since the base oil is GTL like Pennzoil Pure Plua. Any comments welcome.

Regards,
Fred Demmer
Cincinnati, USA
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Fred Demmer
Cincinnati Ohio USA
03 VW Jetta GLS TDI
5W40 Shell Rotella T

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#4753483 - 05/10/18 08:48 PM Re: Determining Severe Oil Service [Re: CincyFritz]
JohnnyJohnson Offline


Registered: 10/22/09
Posts: 3019
Loc: Wet side WA
Its still under warranty you stick with the warranty requirements.
_________________________
2004 Corolla 123807
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: Castrol EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74202
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18

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#4753489 - 05/10/18 08:51 PM Re: Determining Severe Oil Service [Re: CincyFritz]
BrocLuno Offline


Registered: 09/06/15
Posts: 5691
Loc: Kalifornia Kollective
Maybe I'd consider it severe in the cold weather ... But it's warming up nicely and that engine has port injection if older model, so it runs relatively cleanly. Yeah, I know Subies are known to fuel the oil some, but not unless your pushing a lot of turbo boost and beating on it, or it's a Direct Injection engine ...

QSUD will go the distance. I'd just do every 6 months.

You could pull a sample and send it in at shorter time to double check. Then you'd know for sure smile


Edited by BrocLuno (05/10/18 08:53 PM)
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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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#4753496 - 05/10/18 08:58 PM Re: Determining Severe Oil Service [Re: CincyFritz]
4WD Offline


Registered: 09/21/10
Posts: 6891
Loc: Texas
Dealer is OK several brands have good base oil in that grade

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#4753497 - 05/10/18 08:58 PM Re: Determining Severe Oil Service [Re: CincyFritz]
Linctex Offline


Registered: 12/31/16
Posts: 6189
Loc: Waco, TX
Originally Posted By: BrocLuno

QSUD will go the distance. I'd just do every 6 months.

You could pull a sample and send it in at shorter time to double check. Then you'd know for sure smile


I agree with this.

Or just run 5W-40 Shell Rotella T in everything.
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#4753535 - 05/10/18 09:33 PM Re: Determining Severe Oil Service [Re: CincyFritz]
demarpaint Offline


Registered: 07/03/05
Posts: 30161
Loc: NY
That type of driving constitutes severe service driving. I'd follow the owners manual for severe service maintenance.
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#4753561 - 05/10/18 09:57 PM Re: Determining Severe Oil Service [Re: CincyFritz]
Rolla07 Offline


Registered: 11/05/11
Posts: 4797
Loc: MTL, CANADA
6 months would be 3000 miles so id go with every 6 months.
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#4753565 - 05/10/18 10:00 PM Re: Determining Severe Oil Service [Re: Linctex]
Snagglefoot Offline


Registered: 12/31/17
Posts: 2083
Loc: SE British Columbia, Canada
Originally Posted By: Linctex
Originally Posted By: BrocLuno

QSUD will go the distance. I'd just do every 6 months.

You could pull a sample and send it in at shorter time to double check. Then you'd know for sure smile


I agree with this.

Or just run 5W-40 Shell Rotella T in everything.



Do you mean Rotella T3, or some other Rotella product. I think Rotella T is phased out.

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#4753626 - 05/10/18 11:21 PM Re: Determining Severe Oil Service [Re: CincyFritz]
BrocLuno Offline


Registered: 09/06/15
Posts: 5691
Loc: Kalifornia Kollective
Prolly meaning T6 ... But may not really be appropriate for this engine depending on which exact model it is ...
_________________________
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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#4753646 - 05/11/18 12:16 AM Re: Determining Severe Oil Service [Re: CincyFritz]
JLTD Offline


Registered: 12/15/17
Posts: 933
Loc: US
UOA! UOA! UOA!

It's the only way to be certain.
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#4753754 - 05/11/18 05:52 AM Re: Determining Severe Oil Service [Re: CincyFritz]
Johnny2Bad Offline


Registered: 05/20/13
Posts: 2022
Loc: Saskatchewan, Canada
8 miles daily on pavement with some high speed sections is not severe service; it's near ideal, actually.

"Severe Service" is towing, travel on dusty roads with opposing traffic (that's where you eat the dust), and numerous trips where the coolant and lubricants do not meet operating temperatures. You have none of those conditions.
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#4753766 - 05/11/18 06:11 AM Re: Determining Severe Oil Service [Re: Johnny2Bad]
demarpaint Offline


Registered: 07/03/05
Posts: 30161
Loc: NY
Originally Posted By: Johnny2Bad
8 miles daily on pavement with some high speed sections is not severe service; it's near ideal, actually.

"Severe Service" is towing, travel on dusty roads with opposing traffic (that's where you eat the dust), and numerous trips where the coolant and lubricants do not meet operating temperatures. You have none of those conditions.

Severe service is also short hopping where the oil isn't getting to operating temps long enough to burn off excess fuel and moisture. I doubt the oil is getting hot enough long enough to burn off condensation, especially during the winter months. I'd follow severe service or at least pony up for a UOA to eliminate some of the guess work.
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#4753791 - 05/11/18 06:41 AM Re: Determining Severe Oil Service [Re: demarpaint]
doyall Offline


Registered: 06/26/03
Posts: 512
Loc: LA (Lower Alabama)
Originally Posted By: demarpaint
Severe service is also short hopping where the oil isn't getting to operating temps long enough to burn off excess fuel and moisture. I doubt the oil is getting hot enough long enough to burn off condensation, especially during the winter months. I'd follow severe service or at least pony up for a UOA to eliminate some of the guess work.


This. And if you do a UOA, get it somewhere that does gas chromatography fuel dilution testing.

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#4753896 - 05/11/18 08:28 AM Re: Determining Severe Oil Service [Re: CincyFritz]
Brigadier Offline


Registered: 03/11/12
Posts: 590
Loc: WA
A mechanic at the shop I take my cars too said that 'Western Washington is severe service'. So driving over here is sever service....
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#4753917 - 05/11/18 08:47 AM Re: Determining Severe Oil Service [Re: CincyFritz]
CT8 Offline


Registered: 10/09/14
Posts: 11495
Loc: Idaho
Oil is oil. Look at the ratings and when in doubt change it out. Follow the owners manual there is no voodoo needed.
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