10W 30 versus 5W 30
Was getting a snowblower ready for winter...in reading the manual, it calls for 5W 30. However, there is an asterick saying 10W 30 is an acceptable substitute.
So I figure, lets try the recommended one...and the store has a quart for $5 (tax not included). I say, no thanks because I am thinking I have a case of 10W 30 at home. Could not choke up that amount for oil.
Is this a big deal? Any downside to using 10 verus 5W?