Will never touch another filter oil again!!! I've always been a fan of bel ray filter oil but wanted to switch to bio oil so I could clean in my sink without having to smell the harsh cleaners. I first tried twin air bio oil since I love their filters, and this stuff was horrible! It would slowly drip off my filter until after about 2 weeks the filter was dry and all the oil was on the floor of my garage. Then the twin air bio cleaner didn't even clean what was left. I decided to try no toil after seeing some good reviews and this stuff is AMAZING!!! No dripping off the filter, super tacky, and the easiest cleanup ever!!! This stuff is a miracle, I'm hooked for life!