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Vanguard 15w50 #4306708
01/19/17 05:39 AM
01/19/17 05:39 AM
Joined: Oct 2014
Posts: 753
Pa, USA
NH73 Offline OP
NH73  Offline OP
Joined: Oct 2014
Posts: 753
Pa, USA
What do you think of this oil? https://www.briggsandstratton.com/na/en_us/innovations/parts-accessories/vanguard-oil.html Do you think its a good indication of that 15w50 oils is a great choice for small gas engines?


2017 Toyota RAV4 Hybrid
2004 Ford Explorer Sport Trac
2012 Gravely ZT XL 48 w/ Kawasaki FR730
Re: Vanguard 15w50 [Re: NH73] #4306721
01/19/17 06:15 AM
01/19/17 06:15 AM
Joined: Dec 2016
Posts: 7,117
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,117
Waco, TX
I typically avoid "small engine oil" since it's the same exact stuff you can buy off the shelf in a different bottle for much, much less money.


"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: Vanguard 15w50 [Re: NH73] #4306737
01/19/17 06:44 AM
01/19/17 06:44 AM
Joined: Dec 2005
Posts: 493
Missouri
vronline Offline
vronline  Offline
Joined: Dec 2005
Posts: 493
Missouri
Obviously you'll get a lot of varying opinions on here and I know people use heavier oils, but they only spec that for Vanguard engines. B&S specs nothing higher than 30w, and I believe that's all you really need, even in hotter climates.

https://www.briggsandstratton.com/na/en_us/support/faqs/browse/mower-oil-type-and-capacity.html

http://blog.briggsandstratton.com/synthe...4-cycle-engine/

Last edited by vronline; 01/19/17 06:53 AM.
Re: Vanguard 15w50 [Re: NH73] #4307294
01/19/17 04:52 PM
01/19/17 04:52 PM
Joined: Jul 2011
Posts: 710
Delaware
2cool Offline
2cool  Offline
Joined: Jul 2011
Posts: 710
Delaware
If you look around in this subject, you will find MANY posting of the great results people (including me) have gotten with 15W-40. Not that I think anything bad would happen, but I doubt the extra 10 numbers of viscosity will give you any more protection. What is the price difference for a quart? If more than a dollar, why bother? 15W40 is widely available.

Re: Vanguard 15w50 [Re: NH73] #4307419
01/19/17 07:38 PM
01/19/17 07:38 PM
Joined: Oct 2014
Posts: 753
Pa, USA
NH73 Offline OP
NH73  Offline OP
Joined: Oct 2014
Posts: 753
Pa, USA
My experience is oils of the same line are priced the same, weather its 0w20 to 15w50. The reason I ask is because, you could get whatever 15w50 is on sale at the time.


2017 Toyota RAV4 Hybrid
2004 Ford Explorer Sport Trac
2012 Gravely ZT XL 48 w/ Kawasaki FR730
Re: Vanguard 15w50 [Re: NH73] #4307539
01/19/17 09:44 PM
01/19/17 09:44 PM
Joined: Nov 2009
Posts: 5,123
Houston, Texas
motor_oil_madman Offline
motor_oil_madman  Offline
Joined: Nov 2009
Posts: 5,123
Houston, Texas
I think they call for straight 30 in the residential mowers since the home owner will be done mowing by the time it gets hot enough anyways, vs a commercial guy will run all day basically.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Vanguard 15w50 [Re: NH73] #4307569
01/19/17 10:20 PM
01/19/17 10:20 PM
Joined: Oct 2014
Posts: 12,557
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,557
Idaho
I use 15W-40 because that is what I have around for my lawn mowers. If i didn't have the 15W-40 around I would buy 15w-50 syn .


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Vanguard 15w50 [Re: motor_oil_madman] #4307570
01/19/17 10:21 PM
01/19/17 10:21 PM
Joined: Oct 2014
Posts: 12,557
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,557
Idaho
Originally Posted By: motor_oil_madman
I think they call for straight 30 in the residential mowers since the home owner will be done mowing by the time it gets hot enough anyways, vs a commercial guy will run all day basically.
Excellent point !


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Vanguard 15w50 [Re: motor_oil_madman] #4307802
01/20/17 07:56 AM
01/20/17 07:56 AM
Joined: Dec 2016
Posts: 7,117
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,117
Waco, TX
Originally Posted By: motor_oil_madman
I think they call for straight 30 in the residential mowers since the home owner will be done mowing by the time it gets hot enough


I don't think that's it.

First, don't underestimate the abilities of good quality straight 30 weight.
Second, mower oil gets pretty hot pretty fast - far less than 1/2 hour

Lastly, mower engines are built pretty stout, given their low HP per cubic inch.
The rod journal size (surface area) of a typical 3 HP Briggs is the equivalent of an engine making 20+ hp. That's a lot of surface area for such a small power output. That's why these engines run well even when lots of grit has been through the oil - - there's still LOTS of bearing left (in proportion to power output).


"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: Vanguard 15w50 [Re: 2cool] #4307805
01/20/17 07:58 AM
01/20/17 07:58 AM
Joined: Dec 2016
Posts: 7,117
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,117
Waco, TX
Originally Posted By: 2cool
If you look around in this subject, you will find MANY posting of the great results people (including me) have gotten with 15W-40. Not that I think anything bad would happen, but I doubt the extra 10 numbers of viscosity will give you any more protection.


I have to agree with this.

I'd buy you a new engine if you could prove that RotellaT 15W-40, Delvac 15W-40, or Delo 15W-40 caused it to fail. (with normal OCI's of course)


"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: Vanguard 15w50 [Re: NH73] #4307919
01/20/17 09:51 AM
01/20/17 09:51 AM
Joined: Dec 2014
Posts: 509
MB - Manitoba
FastLane Offline
FastLane  Offline
Joined: Dec 2014
Posts: 509
MB - Manitoba
Why not use a synthetic 5W30 like Briggs recommends?


2010 Silverado 4.8 4x4 Mobil 1 5W30 ACDelco PF48E
2002 Mustang GT 4.6 Mobil 1 5W30 MC FL-820S
1966 Cessna 150 Phillips 20W50
2013 Mercury 30hp Mystic 25W40
Re: Vanguard 15w50 [Re: Linctex] #4312702
01/25/17 08:50 PM
01/25/17 08:50 PM
Joined: Nov 2009
Posts: 5,123
Houston, Texas
motor_oil_madman Offline
motor_oil_madman  Offline
Joined: Nov 2009
Posts: 5,123
Houston, Texas
Originally Posted By: Linctex
Originally Posted By: motor_oil_madman
I think they call for straight 30 in the residential mowers since the home owner will be done mowing by the time it gets hot enough


I don't think that's it.

First, don't underestimate the abilities of good quality straight 30 weight.
Second, mower oil gets pretty hot pretty fast - far less than 1/2 hour

Lastly, mower engines are built pretty stout, given their low HP per cubic inch.
The rod journal size (surface area) of a typical 3 HP Briggs is the equivalent of an engine making 20+ hp. That's a lot of surface area for such a small power output. That's why these engines run well even when lots of grit has been through the oil - - there's still LOTS of bearing left (in proportion to power output).


I suppose outside temperature and engine load has a lot to do with it. I know on my bigger mowers, things get warmed up pretty quick. 2-3 minutes and the oil filter is pretty hot to the touch.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Vanguard 15w50 [Re: NH73] #4315351
01/28/17 09:41 PM
01/28/17 09:41 PM
Joined: Mar 2008
Posts: 5,960
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,960
South Florida
Briggs has always recommended a 30 weight for as long as I can remember. The fact that they recommend a synthetic 50 weight for hard use engines is quite interesting. This is what we call a "clue".

For years, since the 2004 hurricane season, I have recommended synthetic 50 weight in all generator applications down here. All Kawasaki engines a 40 weight, all commercial Briggs engines at least 15W40, and SAE 30 or synthetic 10W30 for home owner Briggs equipment.

Briggs must be tired of warrantying engines and has finally figured out what a lot of us already knew.


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
10 Acura TSX 2.4 Maxlife Syn 5W30
06 GMC Sierra Nextgen 10W30


Re: Vanguard 15w50 [Re: bubbatime] #4316047
01/29/17 05:13 PM
01/29/17 05:13 PM
Joined: Oct 2014
Posts: 753
Pa, USA
NH73 Offline OP
NH73  Offline OP
Joined: Oct 2014
Posts: 753
Pa, USA
Originally Posted By: bubbatime
Briggs has always recommended a 30 weight for as long as I can remember. The fact that they recommend a synthetic 50 weight for hard use engines is quite interesting. This is what we call a "clue".

For years, since the 2004 hurricane season, I have recommended synthetic 50 weight in all generator applications down here. All Kawasaki engines a 40 weight, all commercial Briggs engines at least 15W40, and SAE 30 or synthetic 10W30 for home owner Briggs equipment.

Briggs must be tired of warrantying engines and has finally figured out what a lot of us already knew.
Why all Kawasaki engines get a 40 weight? Kawasaki recommends 30, 10w30, 10w40, 20w50 and 5w20(if used below 32 degrees). Basically you could use 30 to 50 weight on a Kawasaki. I have 5w30 full synthetic in my Kawasaki lawn mower that gets ran half hour at a time. Would you recommend to use something of a 40 weight?


2017 Toyota RAV4 Hybrid
2004 Ford Explorer Sport Trac
2012 Gravely ZT XL 48 w/ Kawasaki FR730
Re: Vanguard 15w50 [Re: NH73] #4316484
01/30/17 08:53 AM
01/30/17 08:53 AM
Joined: Mar 2008
Posts: 5,960
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,960
South Florida
Originally Posted By: NH73
Why all Kawasaki engines get a 40 weight? Kawasaki recommends 30, 10w30, 10w40, 20w50 and 5w20(if used below 32 degrees). Basically you could use 30 to 50 weight on a Kawasaki. I have 5w30 full synthetic in my Kawasaki lawn mower that gets ran half hour at a time. Would you recommend to use something of a 40 weight?


Well most Kawasaki engines down here that I serviced are used in a commercial or similar environment. Plus its hot. 30 weight is marginal after hours of use and high heat, so my standard recommendation for anything Kawasaki down here is 40 weight.

Since your equipment is used for 30 minutes in a home owner use cycle, in PA, then synthetic 5W30 will be just fine for you. If it were mine, I would run 15W40 summer and 0W40/5W40 winter anywhere in the lower 48.


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
10 Acura TSX 2.4 Maxlife Syn 5W30
06 GMC Sierra Nextgen 10W30


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