Do you do your own oil changes or do you take your car to a place? I used to just go to this one shop to get it done until the last time when they tried to screw me over. I always check the oil and the filter after every oil change to see if they did replace it and they didn't replace the filter, yet charged me for it. So, now I'm back to doing it myself. I used to think it wasn't worth the hassle of doing it yourself. Just pay $35 and they'll do all the work, including the disposal/recycling of the oil.