Ill bet the stock oilers will run fine if you use a high quality oil (I run AW32 early in the season and as it warms up go to a thicker and thicker oil,,have run 30 wt. at the tail end of the season) like I said befor I try to get mine so I get a drip about every 3-4 seconds when it real hot out,,when it is oiling that much there is ALOT of smog comming out of the muffler and you dont want you tank down wind,,,if you PM me your adress I send you a copy of the owners manual Kevin gave me..........