as for all that dont believe you can damage a engine to over filling... I had my local dealer do the change on my 08 F250 Ford.... They didnt change to oil... they just added 15 quarts to what was there and immediately it started running rough... shaking really bad and no power at all... they told me it was low on fuel and to go get some.... if problem persist come back... So i drove it to the gas station, never made it... smoking like crazy, engine throttle stuck open to where i could hardly stop the truck, trani starts shifting all crazy to keep up with throttle.... long story short they are now replacing all exhaust... this system has a particulate filter... that alone cost $2110. Oil went in to the air filter all over any thing it could squeeze out of.... I get the truck back Friday... we will see what was done and will post the repair.