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Why the 30 at spec for lawn mowers? #4757269
05/14/18 07:17 PM
05/14/18 07:17 PM
Joined: Jul 2016
Posts: 168
EasTn
Sealbilly Offline OP
Sealbilly  Offline OP
Joined: Jul 2016
Posts: 168
EasTn
Air cooled and operation is usually in the summer. Why 30 wt?

Last edited by Sealbilly; 05/14/18 07:18 PM.
Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757278
05/14/18 07:25 PM
05/14/18 07:25 PM
Joined: Jun 2005
Posts: 5,245
North Texas
ARB1977 Offline
ARB1977  Offline
Joined: Jun 2005
Posts: 5,245
North Texas
Why not? Its worked fine in ten year old lawnmower.


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 / Honda filter
Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757283
05/14/18 07:29 PM
05/14/18 07:29 PM
Joined: Jul 2010
Posts: 18,736
PNW
ZeeOSix Offline
ZeeOSix  Offline
Joined: Jul 2010
Posts: 18,736
PNW
No VIs, more shear stable.

Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757288
05/14/18 07:30 PM
05/14/18 07:30 PM
Joined: Jan 2017
Posts: 1,343
Toronna
maxdustington Online content
maxdustington  Online Content
Joined: Jan 2017
Posts: 1,343
Toronna
Straight grades and 10Wx have less VII and are more apt to stay in grade.


03 Jetta AWP/09A 200k kms
Edge 0W40 + Mann 719/30
Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757293
05/14/18 07:33 PM
05/14/18 07:33 PM
Joined: Dec 2016
Posts: 6,260
Waco, TX
Linctex Online content
Linctex  Online Content
Joined: Dec 2016
Posts: 6,260
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


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757320
05/14/18 07:44 PM
05/14/18 07:44 PM
Joined: Dec 2017
Posts: 2,346
SE British Columbia, Canada
Snagglefoot Online content
Snagglefoot  Online Content
Joined: Dec 2017
Posts: 2,346
SE British Columbia, Canada
Originally Posted By: Sealbilly
Air cooled and operation is usually in the summer. Why 30 wt?


Were you thinking 40 wt?


If you want the job done right......do it yourself.
Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757322
05/14/18 07:46 PM
05/14/18 07:46 PM
Joined: Sep 2015
Posts: 5,860
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,860
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


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757342
05/14/18 08:05 PM
05/14/18 08:05 PM
Joined: Jan 2009
Posts: 13,837
Illinois
tig1 Offline
tig1  Offline
Joined: Jan 2009
Posts: 13,837
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.


2007 Ford Fusion 232,000 miles
M1 0-20 EP
2017 Ford Fusion 55K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters

Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757355
05/14/18 08:19 PM
05/14/18 08:19 PM
Joined: Aug 2010
Posts: 1,025
pa
benjy Offline
benjy  Offline
Joined: Aug 2010
Posts: 1,025
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!!

Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757362
05/14/18 08:26 PM
05/14/18 08:26 PM
Joined: Mar 2013
Posts: 4,786
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,786
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.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757417
05/14/18 09:08 PM
05/14/18 09:08 PM
Joined: Feb 2003
Posts: 7,437
Jupiter, Florida
Cujet Online content
Cujet  Online Content
Joined: Feb 2003
Posts: 7,437
Jupiter, Florida
The reason is the high HTHS of a true straight 30.


People who count on their fingers should maintain a discreet silence.
Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757459
05/14/18 10:27 PM
05/14/18 10:27 PM
Joined: Feb 2013
Posts: 171
Texas
Irishman Offline
Irishman  Offline
Joined: Feb 2013
Posts: 171
Texas
30W is the ONLY weight oil I have ever used in all of my lawn mowers.

Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757473
05/14/18 11:02 PM
05/14/18 11:02 PM
Joined: Mar 2008
Posts: 6,837
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,837
USA
I use Dollar Tree 10w30 that comes in that 16 oz bottle smile

Re: Why the 30 at spec for lawn mowers? [Re: slacktide_bitog] #4757480
05/14/18 11:19 PM
05/14/18 11:19 PM
Joined: Mar 2018
Posts: 605
Mississippi
TheLawnRanger Online content
TheLawnRanger  Online Content
Joined: Mar 2018
Posts: 605
Mississippi
Originally Posted By: slacktide_bitog
I use Dollar Tree 10w30 that comes in that 16 oz bottle smile


Who is the distributor?

Last 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
Re: Why the 30 at spec for lawn mowers? [Re: Sealbilly] #4757503
05/15/18 01:40 AM
05/15/18 01:40 AM
Joined: Feb 2015
Posts: 2,202
Slovenia EU
Kamele0N Offline
Kamele0N  Offline
Joined: Feb 2015
Posts: 2,202
Slovenia EU
...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


2011 Hyundai i30 1.4 CVVT Shell Helix Ultra 5w40
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40
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