Took my stihl blower and hedger and with my soon to be sold echo trimmer in to be serviced and came away a few thundred lighter in the pocket but they run now. They all had issues with gas. I was told to use a fuel stabilizer and seafoam to each of them if storing them and stabilizer all the time. I thought that Stihl's oil had some in it and you didn't need to do that any more. How much stabilizer do you use? Do you add it to the gallon jug I'm assuming. What kind of stabilizer is best. Is there difference between stabililzers that state a 2/4 cycle motor to a car's one I have in the garage that I use for the boat etc...?