yes, you can go 10k between oil changes as per ford, but im getting mine changed every 5k or so(it doesnt cost me money and my boyfriend wants to get it done that often) the filter under the hood is the one that requires the "o" rings, is the one that gets changed at oil changes. then there is one in the back that you can get to through a panel on the left side for the battery that need to get changed every 15k or so. As far as needing the "O" rings changed everytime (and additional $20) my boyfriend (who is a ford tec) found out that they can get pinched if the filter is not being put in right. So he had to change mine the first time, but has not the last 3 times. so make sure that the person who is doing your oil changes can do it right and the "O" rings should be fine.