Sorry for the noob question but, how much oil do you add to a 2005 FX35 AWD? Our favorite place just shut down so I took it to the dealer. Not only was it expensive ($90 for Mobile 1), but the Techs in the back were not very professional. They were tossing a football around with customer cars right there, and telling me to go to the Customer waiting area. Anyway, I did search, but could not find a definitive answer. Any help would be great.