02-01-2012, 10:06 PM
Like any mechanical device' lube helps decrease ware in part's. The gas piston helps keep the bolt carrier area cleaner in a dusty environment since oil attracts dust and use of oil in that part of the rifle in a piston set up isn't as crucial as a DI system. The gas piston should be cleaned every so often' though I have shot hundreds of rounds with a Adam Arms piston without cleaning. The Adam Arms piston is very easy to pull out and clean. The DI system can run a long time without cleaning ' but you do need to add oil quite often in the bolt area or it will fail. I have never had a malfunction from not cleaning my gas piston but I have noticed it can be harder to pull the piston out if the piston isn't wiped off every 500 to 1000 round's.