what is the capacity
21oz.
20 ounces 5w30 small engine oil
Yes 10w30 is a good oil for snowblower or lawnmower.
No ( according to the owners manual that came with my Ariens lawnmower ( with a Kohler engine ) SAE 30 if above 40* Fahrenheit SAE 10W-30 if below 40* Fahrenheit
Ariens / Gravely 21535800 oil filter is a match. Ariens/Gravely equip often have Kawasaki engines. My 16hp Kaw FS481V uses the 21535800 oil filter.
As a snowblower is used in the winter use 10w30 weight synthetic oil and change the oil once each year.
SAE 10w30
5W30 conventional oil. Straight out of the manual.
SAE 10w30 synthetic oil.
The correct ratio for that particular snowblower engine is 50 parts fuel to 1 part two-stroke engine oil.
10w40 will work fine!