My dad's Craftsman lawnmower calls for SAE30 as the recommended engine oil.
Because we've been lazy, oil changes have been done using 10w-30 conventional.
My guess is that SAE30 lacks VII, and VII tends to breakdown under severe service, hence the SAE30 recommendation for air-cooled mowers.
Would there be any harm in running 10w-30 in this application, or is SAE30 truly optimal?
Thanks.
Because we've been lazy, oil changes have been done using 10w-30 conventional.
My guess is that SAE30 lacks VII, and VII tends to breakdown under severe service, hence the SAE30 recommendation for air-cooled mowers.
Would there be any harm in running 10w-30 in this application, or is SAE30 truly optimal?
Thanks.