Our crew gets a 5gal jug of Stihl Bio Plus every couple of weeks. We must use about 75 gallons per year. Compared to WAGES, INSURANCE, equipment payments, diesel, saw mix, EQUIPMENT REPAIRS, and misc, bar oil doesn't even show up on radar. Our 2 major contracts are in watersheds so anything we use has an environmental consequence. Bio Plus works well and is easy to clean off a saw. This is the only oil I run either on the crew or personally. I am not against trying every brand of bio oil there is. I just know what works for us.