I think the allen wrench is under the right side cover. It takes 4 quarts. The drain plug is in the front of the engine. Also fill the new oil filter with oil before installing. The oil fill cap is on the right side of the engine above the oil level sight glass. I use a large flat head screw driver with the blade wraped in a paper match cover to unscrew it, won't get damaged.

good luck.

Every normal man must be tempted, at times, to spit on his hands, hoist the black flag, and begin slitting throats. H. L. Mencken