We are older, have three vehicles and drive each one less than 5,000 miles per year. My wife's 15 year old MB has 58,000 miles on it, is always garaged, and we change the oil every 7500-10,000 miles. Your manager and I got into an argument about his opinion that we should change the oil every 6 months regardless of mileage. I am now looking for a new shop for servicing. He is simply wrong, as I am very attuned to cars, subscribe to six car mags, plus Consumer Reports, and there is virtually unanimous opinion that 7500-10,000 miles between oil changes is appropriate if synthetic oil is used. Have never before experienced an argument with a service advisor and felt he was upselling me on unneeded repairs. Her vehicle, once it reaches 60,000 miles (about a year from now) will need extensive servicing, as well as 15 year recommended servicing, but that will be a year from now. Sad about that experience with Jeff's - Autohaus Vick would NEVER have put me through that. And for my Lexus LS 460, Greg's Japanese Auto would NEVER do that!