M1 0W40 OK in my B&S?

[Oldwolf]

Since I'm moving my cars over to Mobil 1 0W-40 I am wondering if running it in my B&S Cast Iron sleeved 6HP engine would be OK?

If not I'll stick with the M1 10W30 I now use. It only holds 20 ounces so either way the cost is not significant.

Thanks for the help!

 

[ARCOgraphite]

Better than the M1 10w-30 which is way underadditised for a small air cooled engine. OTW use john deere plus 50 or RT5 or HD 30.

 

[addyguy]

I'd agree in that application the 'stouter' 0W-40 is what you want.

 

[dsmith41]

Will it work? Yeah. It's overkill if you ask me so of course it will work. I bet those B&S engines could run for 20 years on extra virgin olive oil. Since cost is not an issue, I can't blame you for using M1 0w-40 just to keep things simple.

 

[Oldwolf]

20 ounces to about $4 worth of oil. I change the oil once every 2 years so I might as well use what I have rather than buying something specifically for it.

What I have found is with the M1 10W30 it doesn't seem to use any oil. I probably don't put more then 25 hours a year on it though.

 

[Cmarti]

It will never work, You could blow it up......Ok, I may have overreacted. It will be fine with either. The abuse those Brigss take from most homeowners, yours will feel loved

 

[Oldwolf]

It's going on 13 years old now. Still runs great the way I baby it!

I should put it in my signature!

 

[daman]

the 10w30 would work also just fine,has low VII so its close to a strait 30w also.

 

[JT1]

B&S live for abuse, any motor oil will be good'nuf. My mom's old green push mower had a 3hp b&s on it and the oil NEVER got changed on it.........she ended up throwing it out because the deck had rusted to bits.

 

[DanJ]

I'm going to switch from 30W to 5W30, or even 0W30 for my 8.5 HP B&S. I am getting tired of it not cranking over very well when it is chilly out. I Might even go 5W40, summers here, in NC, are pretty hot.

 

[Oldwolf]

That's the other thing, I can start my mower in the winter with not much problem with a synthetic.

 

[Andyge]

My sister has a Toro lawn tractor(kohler) calls for 10W-30 or 10W-40.

Andy

 

[DaleW]

Not sure about M1, but I know my briggs lawn mower will consume any multi-weight oil. I put in straight 30, and can get a full summer out of it. I agree, the B&S engines can last a long long time, but they do need oil. The manual for my toro push mower calls for a straight 30 weight.

 

[Hitzy]

Would a synthetic 10w30 PCMO or a dino 10w30 HDEO be better for these air cooled B&S engines?
I have been running synthetic, but I'm starting to wonder if the HDEO might be the more stout oil for my 15.5HP lawn tractor.

 

[Oldwolf]

I've had the same M1 10w30 in my engine for 2 years now. Hasn't used any and it still looks clean. Maybe I should let it go for a 3rd year.