I have been going through 3 cases a year for 3 years now and have no issues. I do 100 hour intervals. No problems whatsoever and no engines usr oil between changes I can recall.

 

I have been using it for years now without a problem and in my last three mowers 25 hp and greater have not had one that used oil.

 

Where's Tim Vipond when you need him.

 

Do you think it would be a good idea if Amsoil would offer 20w50,and 10w40 in lawn mower oils (4 stroke small engine oil) ? I think so!

 

Thanks for the feedback guys.

 

Its good oil. Lacks friction modifiers though. B&S 5W30 Synthetic is up there with Amsoil as well and costs roughly the same per quart but is also much easier to find.

As far as a 40 or 50 weight oil Kawasaki K-Tech is a synthetic blend with a high zinc number and Amsoil also sells "Z-Rod" oil in the 10W-30 and 20W-50 weights which would work excellent in small engines since antique/classic cars and small engines rely on very similar additive packs. The latter Z-Rod oil also have friction modifiers unlike the purpose made 4-stroke small engine oil they sell. They keep it out of the 4-stroke formula so it can do double duty and be compatible with wet clutches which aren't too common in outdoor power equipment.