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#4471878 - 07/27/17 11:22 AM Oil for Heavily Used Carbureted Veichles
RamblinMan1990 Offline


Registered: 07/26/17
Posts: 4
Loc: Portland, Or
I have a 1977 GMC Wrecker with a 454 I use daily for towing cars,and a 1982 ford f150 with a 300 six.I was wondering if it was worth it to switch to Mystique 15w50.

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#4471886 - 07/27/17 11:28 AM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
ShotGun429 Offline


Registered: 12/09/04
Posts: 426
Loc: Dayton,Ohio
15w-50 or 20w-50 wont hurt a thing. Im a engine rebuilder here. I see it all.

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#4471896 - 07/27/17 11:35 AM Re: Oil for Heavily Used Carbureted Veichles [Re: ShotGun429]
RamblinMan1990 Offline


Registered: 07/26/17
Posts: 4
Loc: Portland, Or
I'm currently using 15w40.

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#4471903 - 07/27/17 11:47 AM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
addyguy Offline


Registered: 09/08/05
Posts: 14287
Loc: Canada
I think a bulk 15W-40 would work well. It would (probably) be cheaper, and it will protect hard-working engines well.

I'd stay the course with that.
_________________________
2010 Kia Soul 2U - 2.0L I-4, auto; 126k miles.
M1 EP 10W-30; OEM Kia filter.

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#4471918 - 07/27/17 12:07 PM Re: Oil for Heavily Used Carbureted Veichles [Re: addyguy]
Bgallagher Offline


Registered: 04/17/12
Posts: 3159
Loc: Boston, MA
Originally Posted By: addyguy
I think a bulk 15W-40 would work well. It would (probably) be cheaper, and it will protect hard-working engines well.

I'd stay the course with that.


+1 I think this would be perfect. You can get a solid HD 15w-40 that will protect your engine and also give you longer oil changes
_________________________
2017 Chevy Traverse - 28k - Delco Dexos 1 and PF63
2014 Chevy Equinox - 22k - Delco Dexos 1 and PF457G
2015 GMC Terrain - 22k- Delco Dexos 1 and PF457G

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#4471931 - 07/27/17 12:26 PM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2376
Loc: Balearic Islands , Spain
A good 15W-40 HDEO like Shell Rotella, these mixed fleet oils are very tough and work well in old carbed engines.
_________________________
1975 Ford Capri II Ghia 3000 V6, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4471960 - 07/27/17 12:50 PM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
Chris142 Offline


Registered: 06/05/03
Posts: 16811
Loc: Deplorable in apple valley, ca
stick with the 15w40... I dont think there are any bad ones.
_________________________
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

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#4471961 - 07/27/17 12:51 PM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
Brons2 Offline


Registered: 09/16/03
Posts: 3042
Loc: Austin, Texas
OTOH, if you are able to score some 20w50 on sale cheap, I wouldn't hesitate to run it. But most of the time it's easier to find 15w40 on sale. I would run either.

I grew up in Corvallis and worked in an auto & machine shop there when I was in high school and we used NAPA 20w50 in every domestic V8 that came in the shop in the 80s, including in the coldest days of winter. I think we used 10w30 in the imports, but there were a lot less of those.
_________________________
2012 Hyundai Sonata GLS 6MT 2.4GDI, M1 5w30, OEM filter, 2007 Kia Rondo LX 2.4 I4 5 pass, M1EP 5w30, OEM filter

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#4471964 - 07/27/17 12:56 PM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
RamblinMan1990 Offline


Registered: 07/26/17
Posts: 4
Loc: Portland, Or
Well I think rotella will serve me fine then, thanks guys.

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#4471965 - 07/27/17 01:03 PM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
addyguy Offline


Registered: 09/08/05
Posts: 14287
Loc: Canada
Would love to see a pic of the old '77 wrecker - not many oldies like that still working!
_________________________
2010 Kia Soul 2U - 2.0L I-4, auto; 126k miles.
M1 EP 10W-30; OEM Kia filter.

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#4471978 - 07/27/17 01:15 PM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
BrocLuno Offline


Registered: 09/06/15
Posts: 5506
Loc: Kalifornia Kollective
Originally Posted By: RamblinMan1990
I'm currently using 15w40.


Prolly good enough smile

That's what I'd run. HDEO can stand the heat and some fuel dilution. I'd use a known one, but PQIA shows that they are all pretty much good. Delvac, Delo, Rotella, Rural King, TSC (Traveler), all good 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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#4471999 - 07/27/17 01:32 PM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
RamblinMan1990 Offline


Registered: 07/26/17
Posts: 4
Loc: Portland, Or
15w50 syn blend mystique is on sale at O'Reilly for $25 for 2 gallons.

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#4472015 - 07/27/17 01:44 PM Re: Oil for Heavily Used Carbureted Veichles [Re: Brons2]
Chris142 Offline


Registered: 06/05/03
Posts: 16811
Loc: Deplorable in apple valley, ca
Originally Posted By: Brons2


I grew up in Corvallis and worked in an auto & machine shop there when I was in high school and we used NAPA 20w50 in every domestic V8 that came in the shop in the 80s, including in the coldest days of winter. I think we used 10w30 in the imports, but there were a lot less of those.
we did the opposite! Imports got 20w50 and v8s got 10w30 or 10w40
_________________________
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

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#4472040 - 07/27/17 02:04 PM Re: Oil for Heavily Used Carbureted Veichles [Re: RamblinMan1990]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
15W-40 in my 1995 K3500 454 Dually 4WD (7.4 TBI) 272,000 miles on 'er, still original.
_________________________
"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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#4472100 - 07/27/17 03:01 PM Re: Oil for Heavily Used Carbureted Veichles [Re: Chris142]
Rock_Hudstone Offline


Registered: 11/13/07
Posts: 1449
Loc: New Jersey
Originally Posted By: Chris142
stick with the 15w40... I dont think there are any bad ones.

Well, the new CK-4, SN versions are way down on Zn/Ph levels, not exactly good news for older flat tappet engines.

I'd stay with T4 15w-40 Shell Rotella, it still has the higher levels of Zn/Ph and dropped SN rating.

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