From all the oils I have tried over the years, this is the best. Excellent oil. I have consumed 3x5 liters. It has the property of sticking and staying on the chain, so the amount used is very small without spreading and unnecessarily greasing the universe. I use it on a 50cm blade, 54.5cc, 3.5hp. It is economical and always keeps the chain clean without overheating after prolonged use in a forest environment for clean cuts.