Here is a link for someone else having a similar problem:http://www.busnut.com/bbs/messages/11/16306.html?1167962120#POST109588
David, I don't see where you mention what the fuel temperature was. Cold fuel will cause an INCREASE in oil output through the nozzle. Does your unit have some way of bringing the oil temperature up to room temperature before it gets to the pump? The nozzle is rated at 80 degrees.Another poster mentioned heating the oil to make it atomize better, and that will help. But cold oil is a big deal. Here, in Alaska, we use single fuel line installations to prevent cold oil from reaching the pump.For what it's worth.Tom Caffrey