Recent Topics
It's AMSOILŪ, not Amsoil
by Rat407
06/25/18 06:39 AM
VW Passat 2007
by madRiver
06/25/18 06:18 AM
Review: CVJ Remanufactured CV Axles
by The Critic
06/25/18 03:40 AM
Towing without 85w140?
by OilFilters
06/25/18 03:07 AM
2015 VW GTI autobahn oil questions
by Skyalbo
06/24/18 11:28 PM
Corrosion in the garage - salt or humidity?
by Kurtatron
06/24/18 11:13 PM
Darn dogs
by AZjeff
06/24/18 10:21 PM
New GC?
by Bullwinkle007
06/24/18 10:04 PM
The guy with the plexiglass head on you tube
by andyd
06/24/18 09:21 PM
'07 Pacifica Timing Belt Replacement success
by 92saturnsl2
06/24/18 09:10 PM
SAE 90 v 85/140
by Knuckle078
06/24/18 09:10 PM
Mobil 1 5W30-HM 5,011 mi, 1999 Ford Escort
by WA1DH
06/24/18 08:45 PM
Schaeffer's oil reviews on Amazon
by zfasts03
06/24/18 07:41 PM
Decent MP3 player
by Ed_T
06/24/18 07:08 PM
Letgo
by Donald
06/24/18 06:52 PM
Tire buying advice
by supton
06/24/18 06:23 PM
Two versions of M1 5w30 ESP now?
by Patman
06/24/18 06:21 PM
No older cars in New York State?
by Oldtom
06/24/18 06:19 PM
2009 Taurus strut mount noise
by terry274
06/24/18 04:38 PM
A3/B3 vs A3/B4, big difference or irrelevant?
by FordCapriDriver
06/24/18 03:36 PM
Newest Members
dhy808, ROD_Z, lozpxs, danthemanx07, FunktasticLucky
65319 Registered Users
Who's Online
72 registered (2009Edge, 2015_PSD, 63Marauder, badtlc, 10 invisible), 1187 Guests and 36 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65319 Members
67 Forums
285956 Topics
4771963 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4478405 - 08/03/17 05:18 PM Viscosity 10W-30 vs 5W-40
Patrick0525 Offline


Registered: 07/23/14
Posts: 183
Loc: PA
My Kohler 22hp lawn tractor operates using 10W-30 HDEO with no plans to mow this coming season when the temperature drops to 32 F in the eastern US. I cannot use 5W-30 since it will be out of Kohler's viscosity ambient temperature range. Can I use 5W-40 for spring,summer,fall and get the viscosity characteristics of a 10W-30? What is downside of using a 15W-40?

Reference:
Elf viscosity chart
_________________________
'14 Toyota Venza 3.5L 70K mi
TGMO 0W-20/Toyota filter (winter)
PP 0W-20/Fram Ultra filter(spring/summer)



Top
#4478411 - 08/03/17 05:27 PM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
AirgunSavant Offline


Registered: 07/22/15
Posts: 3772
Loc: MD
Use 5w40 year round. T6 is a winner and is great for severe service.
T6 5w40 IMHO has no negatives.

Top
#4478418 - 08/03/17 05:45 PM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
FlyNavyP3 Offline


Registered: 07/04/16
Posts: 1407
Loc: Jacksonville, FL
I have to ask, what do you mean by "get the viscosity characteristics of a 10w30" when referencing a 5w40? Because the answer to that is no. You will get the characteristics of a 5w40 from a 5w40, if you're seeking the level of protection or mft of 10w30 as a minimum then yes the 5w40 would provide that. If you have no plans to use the machine below freezing what's the problem with the 10w30 that you're already running?
_________________________
Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander

Top
#4478451 - 08/03/17 06:38 PM Re: Viscosity 10W-30 vs 5W-40 [Re: FlyNavyP3]
Patrick0525 Offline


Registered: 07/23/14
Posts: 183
Loc: PA
I am under the impression that 10w-30 ambient temp range is within the 5w-40's ambient temp operation range based on the link provided. I want to use a synthetic like T6 but it is only a available in 5w-40 or 15W-40.


Edited by Patrick0525 (08/03/17 06:45 PM)
_________________________
'14 Toyota Venza 3.5L 70K mi
TGMO 0W-20/Toyota filter (winter)
PP 0W-20/Fram Ultra filter(spring/summer)



Top
#4478476 - 08/03/17 07:10 PM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1665
Loc: Crawfordville FL
15w is thicker at ambient. If you aren't going to run mowers when it's 40F or lower 15w-40 would be functionally equivalent to 5w-40.
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

Top
#4478483 - 08/03/17 07:21 PM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
Linctex Offline


Registered: 12/31/16
Posts: 6178
Loc: Waco, TX
Originally Posted By: Patrick0525
What is downside of using a 15W-40?


None that I can think of. It's what I use in all my air cooled engines.

By the time it's cold enough to worry about it being "too thick" (not going to happen, anyway) you won't be cutting grass in PENN anymore....
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

Top
#4478504 - 08/03/17 07:42 PM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
dnewton3 Offline



Registered: 05/14/07
Posts: 7392
Loc: Indianapolis, IN
A dino 10w-30 is all your engine will ever need in the temps you're going to operate in.
You'll want more (more of this, more of that), but your engine could not care less.
_________________________
The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money

Top
#4478528 - 08/03/17 07:59 PM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
merconvvv Offline


Registered: 07/10/16
Posts: 682
Loc: il usa
I am trying to remember when i mowed and it was less than 50 degrees or even 55.
_________________________
1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0

Top
#4478547 - 08/03/17 08:24 PM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
walterjay Offline


Registered: 04/12/09
Posts: 236
Loc: Maryland
I use Rotella T6 5-40 Year round in my JD tractor. I mow and push snow. Works great in all temps. I have also used Mobil1 0W40 and that works well also.

Top
#4479058 - 08/04/17 02:15 PM Re: Viscosity 10W-30 vs 5W-40 [Re: Linctex]
AirgunSavant Offline


Registered: 07/22/15
Posts: 3772
Loc: MD
Originally Posted By: Linctex
Originally Posted By: Patrick0525
What is downside of using a 15W-40?


None that I can think of. It's what I use in all my air cooled engines.

By the time it's cold enough to worry about it being "too thick" (not going to happen, anyway) you won't be cutting grass in PENN anymore....



Agreed- he may see a 1.5% to 3% fuel consumpton increase from the listings I have seen using a 15w40 over a 10w30
Citgo HDEO and others like Delo list specs like that

Top
#4479637 - 08/05/17 08:04 AM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
Patrick0525 Offline


Registered: 07/23/14
Posts: 183
Loc: PA
I email Kohler, and they don't recommend 5W-40 as a substitute for 10W-30? Why? I thought ambient 90 to 100F would be covered.
_________________________
'14 Toyota Venza 3.5L 70K mi
TGMO 0W-20/Toyota filter (winter)
PP 0W-20/Fram Ultra filter(spring/summer)



Top
#4479719 - 08/05/17 09:40 AM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1665
Loc: Crawfordville FL
Ask Koehler why...

Temp range does not tell the whole story. Run 10w30 and quit worrying about it
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

Top
#4479795 - 08/05/17 10:58 AM Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525]
Patrick0525 Offline


Registered: 07/23/14
Posts: 183
Loc: PA
This B&S response to engine oil viscosity
Yes this different than Kohler's recommendation.

=======================================================
B&S
Small Engine Oil Type Recommendations:

Use SAE 30 in warmer temperatures of 40° F and higher (5° C and higher).
Use SAE 10W-30 for a varying temperature range of 0 to 100° F (-18 to 38° C), this grade of oil improves cold weather starting, but may increase
oil consumption at 80° F(27° C) or higher.
A synthetic oil SAE 5W-30 is the best for very cold temperatures of -20 to as high as 120° F (-30 to 40° C) providing the best protection at all
temperatures as well as improved starting with less oil consumption.
Use SAE 5W-30 for very cold temperatures of 40° F and below (5° C and below).
For continuous-use, such as commercial lawn cutting or pressure washing, use Vanguard 15W-50 Oil (temperatures from 20°F to 130°F).

Things to keep in mind when choosing lawn mower oil:

Use a high quality detergent oil classified "For Service SF, SG, SH, SJ" or higher.
Do not use special additives.
Synthetic oils are an acceptable oil at all temperatures. Use of synthetic oil does not alter required oil change intervals.
_________________________
'14 Toyota Venza 3.5L 70K mi
TGMO 0W-20/Toyota filter (winter)
PP 0W-20/Fram Ultra filter(spring/summer)



Top