Husqvarna Chain and Bar Oil. $10:00/L at my local chainsaw shop. Similar characteristics: penetrates, built for low throw, detergents to keep things clean. Because I have a lube-tube fitted it is still flowing in to the dispenser, but so far it hasn't affected the flow rate. I'll just keep an eye on it until I'm running only the Husky stuff and adjust as required (about 10,000 kilometres, probably!)