True, though I think you'd be surprised by just how much filler is in the park and phil grease. I don't know what they use for filler in the pedros stuff, but I steer clear of it because it smells so d*** toxic -- gives me a headache every time I crack open a can. The point I was trying to make is that especially with old grease, it's not just really thick motor oil that you're trying to clean out, but actually a lot of other stuff.