just acquired this and want to change the oil before i use it. the book says SAE 5w30. i have no idea what the last guy put in it, but is plain old 5w30 the best to use as per mfg? or are ppl using something better? it has 2000 miles. i believe this model uses the same oil for engine and gearbox (hoping oil change helps some w/ hard shifting as i had read it does for some).
thanks.
thanks.

