during summer im going to take a vacation, and i need a good way to store the enignes, any sugestions? should i drain oil? stabil?

If it's 4 weeks I wouldn't worry about doing anything. If they are outside put a tarp on them.

no its in a garage, but what about the gas? should i put stabil?

Put in some stabil it sure can't hurt
especially with the reformulated gas I think it is even more important.
I even try to get the regular unleaded gas whenever I can.
Everything seems to run better, start better and better mileage.
Thank you EPA :(

Got MMO? this will do good short term fuel stabilization.

yeeeah... but ya know me bugman! "oops too much. why is this engine smokin??" :p

and eh... regular? i thought supreme gave ya more mileage? and i read in popular mechanic that shell's gas actually cleans your valves... is that correct?