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#4306708 - 01/19/17 05:39 AM Vanguard 15w50
NH73 Offline


Registered: 10/31/14
Posts: 699
Loc: 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?
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#4306721 - 01/19/17 06:15 AM Re: Vanguard 15w50 [Re: NH73]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: 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."

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#4306737 - 01/19/17 06:44 AM Re: Vanguard 15w50 [Re: NH73]
vronline Offline


Registered: 12/31/05
Posts: 493
Loc: 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/


Edited by vronline (01/19/17 06:53 AM)

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#4307294 - 01/19/17 04:52 PM Re: Vanguard 15w50 [Re: NH73]
2cool Offline


Registered: 07/13/11
Posts: 710
Loc: 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.

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#4307419 - 01/19/17 07:38 PM Re: Vanguard 15w50 [Re: NH73]
NH73 Offline


Registered: 10/31/14
Posts: 699
Loc: 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.
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#4307539 - 01/19/17 09:44 PM Re: Vanguard 15w50 [Re: NH73]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: 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.


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#4307569 - 01/19/17 10:20 PM Re: Vanguard 15w50 [Re: NH73]
CT8 Offline


Registered: 10/09/14
Posts: 11008
Loc: 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 .
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#4307570 - 01/19/17 10:21 PM Re: Vanguard 15w50 [Re: motor_oil_madman]
CT8 Offline


Registered: 10/09/14
Posts: 11008
Loc: 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 !
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"Don't let your preconceived notions get in the way of facts."
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#4307802 - 01/20/17 07:56 AM Re: Vanguard 15w50 [Re: motor_oil_madman]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: 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."

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#4307805 - 01/20/17 07:58 AM Re: Vanguard 15w50 [Re: 2cool]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: 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."

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#4307919 - 01/20/17 09:51 AM Re: Vanguard 15w50 [Re: NH73]
FastLane Offline


Registered: 12/10/14
Posts: 449
Loc: MB - Manitoba
Why not use a synthetic 5W30 like Briggs recommends?
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2010 Silverado 4.8 4x4 Mobil 1 5W30 ACDelco PF48E
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1966 Cessna 150 Phillips 20W50
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#4312702 - 01/25/17 08:50 PM Re: Vanguard 15w50 [Re: Linctex]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4858
Loc: 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.


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#4315351 - 01/28/17 09:41 PM Re: Vanguard 15w50 [Re: NH73]
bubbatime Offline


Registered: 03/18/08
Posts: 5627
Loc: 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.
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12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
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#4316047 - 01/29/17 05:13 PM Re: Vanguard 15w50 [Re: bubbatime]
NH73 Offline


Registered: 10/31/14
Posts: 699
Loc: 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?
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2017 Toyota RAV4 Hybrid
2004 Ford Explorer Sport Trac
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#4316484 - 01/30/17 08:53 AM Re: Vanguard 15w50 [Re: NH73]
bubbatime Offline


Registered: 03/18/08
Posts: 5627
Loc: 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
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30



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