I use quite a bit of gear lube and change differentials on large trucks and equipment. I use a hand pump on 5 gallon pails. It is really nice getting that lube warmed up as it makes pumping a heck of a lot easier, and quicker. I also brew my own beer once in a while using liquid extract in 5 gallon pails. Since this heater is used on the outside and not an immersion heater, I won't have any problems with oil contamination in my beer when I use it on those pails! YAY BEER! And the heater couldn't be easier to use. Just slip it on and plug in. Adjust the temp and wait.