I have never used Eddies for an oil change but they did do some work installing engines in my friends boat. Dont know where these guys got their marine certification but they cant work on engines period! My friend called me after paying Eddies to install twins and I found numerous problems and after the install the engines wouldnt even run! I spent nearly a week in the bilge fixing problems including fixing a hole drilled thru the bracket of the remote oil filter causing oil to squirt everywhere. I was able to get the engines turning and burning no thanks to these guys.