I would have thought that one of the non-soluble..... whatever you call non-soluble suds, would have been ideal in that situation. Alan ----- Original Message ----- From: "Ron Head" <ron.head@xxxxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Tuesday, November 25, 2008 6:27 PM Subject: [modeleng] Re: Soluable oil Hi Phill My shop gets pretty cold in winter too, and I've had the problems you describe. Turn on the pump and what comes out mostly water, the oil having turned to a sludge at the bottom of the tank. Stirring it up with a stick works to some extent, but I eventually finish up ditching the stuff, which is a problem because you can't pour it down the drains. Have you tried different mixture strengths? I normally use only 5%, perhaps a higher concentration might be better. Anyone else got any better ideas? Regards Ron In chilly Oxford UK MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.