NORMZILLA44
Addicted to ArboristSite
Sure the ultra is designed for older machine's. Synthetic has been around as long as many of them it is no knew concept. I was say any reputable synthetic toadya is the best thing going. It's been tested, and tried, and proven for year's. The modern oil is the outcome. Stihl has some of the best engineer's in the world under there roof's. They test the saw's, and oil constantly. That's why they are a top brand. As like anybody with car's, motorcycle's, saw's whatever. Everyone will have a preference. Today's gas had been problem's time, and time again the saw oil maker's take this into account, and constantly try, and improve. Just like making better fuel line's, and carb kit's to compensate.