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#4757269 - 05/14/18 07:17 PM Why the 30 at spec for lawn mowers?
Sealbilly Offline


Registered: 07/02/16
Posts: 162
Loc: EasTn
Air cooled and operation is usually in the summer. Why 30 wt?


Edited by Sealbilly (05/14/18 07:18 PM)

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#4757278 - 05/14/18 07:25 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
ARB1977 Offline


Registered: 06/12/05
Posts: 5134
Loc: North Texas
Why not? Its worked fine in ten year old lawnmower.
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2015 Tacoma 4.0L 60K (as of 02/23/18)
Amsoil SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Factory filter

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#4757283 - 05/14/18 07:29 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
ZeeOSix Offline


Registered: 07/22/10
Posts: 17465
Loc: PNW
No VIs, more shear stable.

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#4757288 - 05/14/18 07:30 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
maxdustington Offline


Registered: 01/21/17
Posts: 392
Loc: Toronna
Straight grades and 10Wx have less VII and are more apt to stay in grade.
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03 Jetta AWP/09A 200k kms
TGMO 0W20 "Legend" & Hella Magnet Filter

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#4757293 - 05/14/18 07:33 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
Linctex Offline


Registered: 12/31/16
Posts: 5950
Loc: Waco, TX
Straight 30 can handle some serious abuse.

We had an International 806 diesel go to 15,000 hours with no overhaul

Straight 30 all its life
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"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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#4757320 - 05/14/18 07:44 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1530
Loc: Alberta
Originally Posted By: Sealbilly
Air cooled and operation is usually in the summer. Why 30 wt?


Were you thinking 40 wt?

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#4757322 - 05/14/18 07:46 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
BrocLuno Offline


Registered: 09/06/15
Posts: 5389
Loc: Kalifornia Kollective
Yup, as others have said - no VII to shear down. All oil, all lube smile

No plastics to gum up a hot-spotted air cooled motor laugh
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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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#4757342 - 05/14/18 08:05 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
tig1 Offline


Registered: 01/03/09
Posts: 13583
Loc: Illinois
Because a 30wt oil works great. It worked great in my 22 year old Honda walk behind mower, an 20 years in my B&S push mower and has worked great in all the rest of my OPE.
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M1 ATF and MC LV
M1 10-30 in all OPE
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#4757355 - 05/14/18 08:19 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
benjy Offline


Registered: 08/23/10
Posts: 821
Loc: pa
if you opt for a PAO or Ester 30W it actually meets the 10-30 spec WITHOUT VII's! you say just a mower but they can get very expensive + as noted air cooling especially at low speeds is minimal, unlike an air cooled motorcycle @ 50 MPH!!

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#4757362 - 05/14/18 08:26 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
skyactiv Offline


Registered: 03/02/13
Posts: 4272
Loc: The Midwest
Briggs & Stratton now recommends synthetic 5W30 in most of their engines except the Vangaurd series.
Interesting chart: http://sears.briggsandstratton.com/walk/oil.asp

I think Briggs & Stratton more or less says you can use synthetic 5W30 in old equipment.
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Me: 13' VW GTI 3 door 6 speed manual

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#4757417 - 05/14/18 09:08 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
Cujet Offline


Registered: 02/15/03
Posts: 7056
Loc: Jupiter, Florida
The reason is the high HTHS of a true straight 30.
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#4757459 - 05/14/18 10:27 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
Irishman Offline


Registered: 02/01/13
Posts: 151
Loc: Texas
30W is the ONLY weight oil I have ever used in all of my lawn mowers.

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#4757473 - 05/14/18 11:02 PM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
slacktide_bitog Offline


Registered: 03/20/08
Posts: 5982
Loc: USA
I use Dollar Tree 10w30 that comes in that 16 oz bottle smile

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#4757480 - 05/14/18 11:19 PM Re: Why the 30 at spec for lawn mowers? [Re: slacktide_bitog]
TheLawnRanger Online   content


Registered: 03/18/18
Posts: 209
Loc: Mississippi
Originally Posted By: slacktide_bitog
I use Dollar Tree 10w30 that comes in that 16 oz bottle smile


Who is the distributor?


Edited by TheLawnRanger (05/14/18 11:19 PM)
_________________________
'99 Cavalier 5w 30 SuperTech conventional
'11 Impala 5w 30 Magnatec full synthetic
'12 Colorado 5w 30 Magnatec full synthetic
*regular Wix oil filters for all

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#4757503 - 05/15/18 01:40 AM Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly]
Kamele0N Offline


Registered: 02/09/15
Posts: 1997
Loc: Slovenia
...could be even because they are usually splash lubricated....? But my B&S 3.5classic lawnmover still works after a 20+years on whatever in Sae40... shrug
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2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD various 10w40

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