Yeah, works well on my LR4, use it all the time. Measured the oil coming out and going in, and can confirm the Mityvac gets all of the oil. LR3 might be a little different with the oil pickup pipe location. Somethings about the Mityvac. 1. add a little Pex valve to the rubber adaptor end of the thicker (main) pipe great for controlling flow rather than relying on the discharge/evacuate valve. 2. Epoxy the rubber reduction adaptor to the end of the thicker pipe (if you only use one reduction pipe) stops it from falling off and reduces suction loss. Overall- if the Mityvac can work for your situation, highly recommended.