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Viscosity 10W-30 vs 5W-40 #4478405
08/03/17 05:18 PM
08/03/17 05:18 PM
Joined: Jul 2014
Posts: 267
PA
Patrick0525 Offline OP
Patrick0525  Offline OP
Joined: Jul 2014
Posts: 267
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)


Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4478411
08/03/17 05:27 PM
08/03/17 05:27 PM
Joined: Jul 2015
Posts: 3,772
MD
AirgunSavant Offline
AirgunSavant  Offline
Joined: Jul 2015
Posts: 3,772
MD
Use 5w40 year round. T6 is a winner and is great for severe service.
T6 5w40 IMHO has no negatives.

Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4478418
08/03/17 05:45 PM
08/03/17 05:45 PM
Joined: Jul 2016
Posts: 1,482
Jacksonville, FL
FlyNavyP3 Offline
FlyNavyP3  Offline
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Posts: 1,482
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
Re: Viscosity 10W-30 vs 5W-40 [Re: FlyNavyP3] #4478451
08/03/17 06:38 PM
08/03/17 06:38 PM
Joined: Jul 2014
Posts: 267
PA
Patrick0525 Offline OP
Patrick0525  Offline OP
Joined: Jul 2014
Posts: 267
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.

Last 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)


Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4478476
08/03/17 07:10 PM
08/03/17 07:10 PM
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,755
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
Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4478483
08/03/17 07:21 PM
08/03/17 07:21 PM
Joined: Dec 2016
Posts: 6,239
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,239
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."
Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4478504
08/03/17 07:42 PM
08/03/17 07:42 PM
Joined: May 2007
Posts: 7,507
Indianapolis, IN
dnewton3 Offline
dnewton3  Offline
Joined: May 2007
Posts: 7,507
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
Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4478528
08/03/17 07:59 PM
08/03/17 07:59 PM
Joined: Jul 2016
Posts: 682
il usa
merconvvv Offline
merconvvv  Offline
Joined: Jul 2016
Posts: 682
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
Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4478547
08/03/17 08:24 PM
08/03/17 08:24 PM
Joined: Apr 2009
Posts: 288
Maryland
walterjay Offline
walterjay  Offline
Joined: Apr 2009
Posts: 288
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.

Re: Viscosity 10W-30 vs 5W-40 [Re: Linctex] #4479058
08/04/17 02:15 PM
08/04/17 02:15 PM
Joined: Jul 2015
Posts: 3,772
MD
AirgunSavant Offline
AirgunSavant  Offline
Joined: Jul 2015
Posts: 3,772
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

Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4479637
08/05/17 08:04 AM
08/05/17 08:04 AM
Joined: Jul 2014
Posts: 267
PA
Patrick0525 Offline OP
Patrick0525  Offline OP
Joined: Jul 2014
Posts: 267
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)


Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4479719
08/05/17 09:40 AM
08/05/17 09:40 AM
Joined: Jun 2011
Posts: 1,755
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline
Joined: Jun 2011
Posts: 1,755
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
Re: Viscosity 10W-30 vs 5W-40 [Re: Patrick0525] #4479795
08/05/17 10:58 AM
08/05/17 10:58 AM
Joined: Jul 2014
Posts: 267
PA
Patrick0525 Offline OP
Patrick0525  Offline OP
Joined: Jul 2014
Posts: 267
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 20F to 130F).

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)



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