Hey...I live in Texas...so heat is not really an issue...but I race cars...changing oil every few races (11Quarts each time) so I have an abundance of used oil...and sometimes it gets down to 60 degrees so...figured I could kill two birds with one stone...but...I cant seem to get a clear idea on how to build one...so..can someone tell me where to look? I was hoping a to find a simple drip feed type heater to build...