Tag on my new engine. Synthetic oil recommended below 32 degrees F. Change oil after first 5 hours, every 50 hours thereafter. and "DO NOT OVERFILL" My take. It's a no brainer to use synthetic oil in winter. They claim it's 20 oz oil capacity, yet on my old engine after a complete empty and re-fill with 20 oz. it was over fill mark. Easier to fill from top thru dipstick hole, then thru bottom oil fill where they claim to fill to overflow. Read another gent had same problem and he put 16oz in. Did the same and gets it between full/add. Added a touch more 1/2 oz-? to get a little higher but below the Full mark. Why they give a wrong oil capacity is a loss to me.