I do not have idea where you read/heard that gas has be less than one month old on lawn mower. Are you going to buy a can of gas every time you mow?
I just used up a gallon of gas for mower. It lasted me almost 3 years. No problem on gas or mower.
I just used up a gallon of gas for mower. It lasted me almost 3 years. No problem on gas or mower.