Review on Hanperal DC 12V 5L Transfer Pump: Efficient Oil Fluid Scavenging & Suction Vacuum by Christian Barnes

I have an Audi A4 and the under covers are very difficult to remove when changing the oil. I figured for the money I'd try this little pump and it would work. The hose on the intake side flattened out a bit during the process due to the thickness of the oil, even though it was warm 0-W20 synthetic oil. The Revain picture shows a reinforced hose where the inlet connects to the pump, but I didn't have one. It took about 7 minutes but all the oil was pumped out and I saved 1 oil change on what I would pay for a shop oil change. I had to use a spare car battery to power the pump as the Audi battery is under the back seat. The battery cables are very short.