I'm using Royal Purple Max Cycle 10w30 in a Husqvarna push mower with a Kohler engine. The mower is used 3/4 of the year to mow my front and back yard. The oil has one year of use on it and it is still purple in color when I check the oil level but in our cars the RP changes from purple to amber pretty quickly. Should I do my annual spring oil change because there's no oil filter or let it run longer because the oil still "looks" new?
Mower takes a little over 1/2qt.
Mower takes a little over 1/2qt.