3 Stihl's and a Tanaka arborist, top handle saw. 028 Wood Boss, 056 and 075 with a 4 foot bar. Tanaka (Mikata) has a 12" trim bar. 325 pitch on the 2 smaller saws, 1/8" lo pro on the Tanaka and .404 skip tooth, flat tooth cross cut ripper on the 075 (takes serious power for that).
I leave gas in them all winter. Stihl pre-mix has stabilizer in it, but then I use them in the winter once in a while. Same with my FS66 brush trimmer. Gas all winter, never an issue.
Use Stihl engine oil (pre-mix) and Husky bar oil (when it's on sale, buy a couple gallons).