So my garbage Homelite blower stopped working. Splurged a bit, and picked up a Stihl, which has a nice punch. However, the shop owner I purchased it from said something that I've never heard before (paraphrased below)... Quite honestly, I'm not so sure what to feel about this... It's the first time I've heard it, but also, it's the first higher end blower I've ever bought. All my equipment at home says to use a 50:1 mix, including my new Stihl blower. Should I switch to 32:1, or use 50:1 as specified? And I suppose brand name oil is a must?