thanks for the help/info guys...really appreciate it.

My set-up for heating is this...55gal drum, with cone welded to bottom. The water heater element is plumbed into the bottom of the cone, thus, submerged in straight oil. PAcf mounted inside the drum, with drum lid having numerous holes to relieve moisture / heat build-up.

That was my concern, was the element being submerged in the oil. With oil being "flushed" with gas/d2, it seemed to me that then, the oil being heated with element within, was a bad idea. Think, im NOT gunna "splash" gas to oil, for cleaning purposes. Will however, introduce gas/d2 AFTER the oils' done cf-ing and ready for the truck

I've seen those videos from Parkland with the oil vapors, combusting and running (flames) on their own. I dont think my oil needs to be that hot..(140-160*), for that to take effect?

I'm running a PA motor/pump to move my oil through the CF, and a H.F. pump to push the oil through the filters...