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#4631390 - 01/11/18 11:49 AM Mobil 1 10W-30 in lawn mower engine
perryg114 Offline


Registered: 11/22/04
Posts: 75
Loc: Orlando, FL
I just bought a Sears rider with a 21 HP Briggs in it. I plan on mowing 3 acres with it so it will get some use. Would it hurt to run Mobil 1 10W-30 in it? I have some old Delo 400 non-synthetic diesel oil as well. Most of the time I run mineral oils in push mowers but this one is a little more expensive so I want it to last. I was worried the 10W-30 was too thin. I have gotten rid of most of my cars and trucks that used 10W-30 so I have several 5 qt jugs of M1 laying around.

Perry

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#4631395 - 01/11/18 11:57 AM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
JohnnyJohnson Offline


Registered: 10/22/09
Posts: 2750
Loc: Wet side WA
I use my synthetic left overs up in my mower and I change it out a couple times a season. My plug has almost stop fouling completely.
_________________________
2004 Toyota Corolla 121707
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4631397 - 01/11/18 11:57 AM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
CT8 Offline


Registered: 10/09/14
Posts: 10984
Loc: Idaho
DELO 15W-40 oils are used in $500,000.00 engines. Mobil 1 oils are great as well use what ever oil you feel like . Do an early oil change to get the sparkles out of the oil keep the air filter and intake sealed, do change the trans oil . change the oil regularly and the mower will lastand last.
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4631399 - 01/11/18 12:00 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
4WD Offline


Registered: 09/21/10
Posts: 6390
Loc: Texas
Been there done that for years ~ 19 HP Sears (Briggs) on 10w30 Synthetic


Edited by 4WD (01/11/18 12:00 PM)

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#4631401 - 01/11/18 12:00 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
old1 Offline


Registered: 01/04/11
Posts: 1001
Loc: Columbus Nebraska
With a full synthetic oil, I believe Briggs now spec's 5w30, so the 10w30 should be great. I have always used straight weight 30, but even I have started to use multi weight oils in my OPE now. Mostly semi or full synthetic though.
_________________________
2017 Nissan Frontier 4.0 5w30
1965 Mustang 200 c/4 10w30 QS defy
1964 Ford Ranchero 302 c/4 15/40 Delo
1929 ford model A No filters, and 15/40 oil

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#4631402 - 01/11/18 12:01 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
Virtus_Probi Offline


Registered: 06/25/15
Posts: 3970
Loc: New England
I've never had a rider, but I think the manual for every mower I've owned recommended SAE30 or maybe 10W30 for the newer ones.
I'd think 10W30 would be absolutely fine for your rider unless maybe you use some accessories that add a big load on the engine...??? Or am I thinking more like garden tractor there?
_________________________
2014 Forester XT, 80500 miles
Last Change;
Valvoline Full Synthetic 5W30 d1G2
Tokyo Roki 15208AA170 filter

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#4631403 - 01/11/18 12:02 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
LeakySeals Offline


Registered: 02/18/11
Posts: 6578
Loc: Hudson, NH
The spec is 5w30 syn, 10w30, 30w depending on climate temps on all Briggs now. I run my truck, 26 HP Sears 50" tractor, toro lawnmower, craftsman 8hp snowblower on the same oil. M1 5w30. But M1 10w30 should be fine for you in the FL climate. Just like auto engines, modern small engines are better refined with smaller tolerances that allow for thinner oils. And thats good, less power lost to small engines fighting to turn in thick oil. Starts a lot easier too!
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 149k ST HM 10w30

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#4631444 - 01/11/18 12:32 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
tig1 Offline


Registered: 01/03/09
Posts: 13661
Loc: Illinois
I have the 21 HP briggs rider from Craftsman. It's been through 6 mowing seasons now and I use M1 10-30 as I do with all my OPE. Two years ago the head gasket blew, which is common for their engines. When I pulled the head the cyl wall was perfect and the engine was very clean. I change oil every 1 1/2 years and use the MC FL 910 oil filter. I have used M1 10-30 for around 30 years and never had an engine failure.
_________________________
2007 Ford Fusion 227,000 miles
M1 0-20 EP
2017 Ford Fusion 49K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#4631450 - 01/11/18 12:41 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Is the 21hp Briggs a large single?

I change a lot of connecting rods in large single-cyl OHV Briggs engines.
They just break. I hope they fixed their flaws.
_________________________
"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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#4631494 - 01/11/18 01:29 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
boraticus Offline


Registered: 04/19/09
Posts: 2905
Loc: Canada
Mobile 1 10W30 will be fine.

I had a 2002 15 h.p. Kawasaki powered riding mower. I ran whatever I had in the garage from 5W30, 10W30, 10W40, to 15W40 in it and often mixed in any combination to put enough oil together to do an oil change. The machine cut three half acre lots with a 10:1 grade every few days during summer. Going on sixteen years old and still running strong.

A word of advice:

Keep the trans-axle cooling fan clear of debris. If you don't you'll cook the trans-axle. My neighbour and I bought exactly the same brand new Husqvarna 15 h.p. machines at the same time. He didn't blow out the dried grass that collected on and around the trans-axle cooling fan. He cooked the trans-axle in 2010. So far, my machine has lasted twice as long with the original trans-axle. By the way, his engine was still running great and it also didn't receive the same level of maintenance that mine did. Nonetheless, the Kawasaki engine was still running well despite his negligence.

I wouldn't sweat the oil to be used as long as it's decent quality and within the manufacturers specifications.

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#4631544 - 01/11/18 02:14 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
LeakySeals Offline


Registered: 02/18/11
Posts: 6578
Loc: Hudson, NH
Lol tig..
_________________________
06 Escalade 6.0L AWD 160k. M1 5w30 Fram TG
03 Maxima 3.5L 149k ST HM 10w30

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#4631642 - 01/11/18 04:23 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
bchannell Offline


Registered: 01/09/08
Posts: 375
Loc: WV
Im as anal about oil as the next guy, (the next guy on here), and use Delo syn in my JD 425, but really, for Briggs, Tecumseh, kohler, Onan, kawi etc, i really think you could walk into an auto parts store and throw a dart in the oil section, and use what you hit, and never have a problem. Ive seen old Briggs run on nearly water, never changed, and they just keep pounding.
Now, all i gotta do is convince myself to just do it!!!

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#4631653 - 01/11/18 04:40 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
FZ1 Offline


Registered: 02/07/08
Posts: 4727
Loc: Texas
I use the M1 10-30 in my Honda mower ...runs nice.

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#4631677 - 01/11/18 05:11 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
dakota99 Offline


Registered: 09/27/09
Posts: 463
Loc: indiana
I use Mobil 1 0w40 in my 21hp craftsman rider and it works just perfect, never moves on the dipstick. 10w30 would be just the same I imagine.

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#4631756 - 01/11/18 06:36 PM Re: Mobil 1 10W-30 in lawn mower engine [Re: perryg114]
Eddie Offline


Registered: 12/07/03
Posts: 9569
Loc: Florida, Cape Coral
I use 10w30 T5 in my B&S 20HP twin. !0W30 works just fine with these engines Ed
_________________________
CX5 Touring 2.5L :-)

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