Rotella 15w 40 oil in a B&S?

[Nutball]

What do you think of Rotella T oil in a 12.5HP Briggs vertical shaft engine? Someone changed the oil to that, should I leave it?

 

[Lions fan]

Might be harder to start if the weather drops below freezing, otherwise should be just fine.

 

[Inlineforagoodtime]

I use 5w 40 in my splitter engine and it works just fine. If the temp dips below freezing you might want to pull the engine over slowly before pull starting. It might help with the longevity of the pull rope.

 

[Stem]

splash lube engine or pressure lube? it'll be alright for warmer temps. normally run 10w30/40 & 5w30 for cold temps.

 

[FederalQ]

I have used 15W-40 and 5W-40 diesel oils in my 12.5 hp Simplicity splash b&s engine for years. Mostly used in the summer. The mower is over 30 years old now.

 

[Nutball]

I thought they were supposed to take non detergent oil. I plan on storing it in the garage and can preheat the engine with a diesel heater.

 

[jblnut]

Everything on the farm from the push mowers to combines and minivans and skid loaders get 15w-40 all year long. Never had an issue we traced back to oil. It’s much easier just having one big tank of oil to pull from.

I’d say run it.

 

[FergusonTO35]

Keeping oil topped off and changed regularly is way more important than anything else. I use store brand synthetic 10w30 in everything except the diesel tractor.

 

[r7000]

Someone changed the oil to that, should I leave it?

 

[huskihl]

That particular 15–40 is very good at cleaning up carbon left behind from not changing other oils often enough. I have seen Honda 1000 and 2000 W generators burn oil and shut down before they ran out of gas. Changed to Rotella t 15w-40 and the problem went away instantly. Oil was black after 10 hours run time. The detergents in it are amazing