Something is not tight enough or restricted, causing you to draw air into the system. I assume you have new filters on there, those will plug real fast with a poorly filtered batch of oil. What kind of fittings are you using where your hose clamps are? Are they multi-barbed, or just rubber over metal? Low quality connections will surely give you trouble. This is a likely place for a leak. Even if you would not normally draw air into the system at one of these points, if there is any kind of restriction at all, air will get sucked. You do need 3/8" id hose at a minimum. Is the oil hot and thin, or cold and thick?

I'm using a variety of metal hose clamps on the tubing...the oil might be ****, I'm not certain of the source though I know it's double filtered. The filter is brand new...I haven't been able to drive the car on veg oil yet.....

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