Ok my LS just went over 70,000 miles, anything that i should be changing. i bought the car with 60,000 and i will presume that no preventative maintenance has been done to the car, so should i be considering changing spark plugs or anything yet?? Tranny fluid?? Oh another question a friend of mine is a reseller for amsoil and royal purple sythetics. I told him i am considering changing the tranny fluid to synthetic hoping it will keep the tranny running cooler and better protection giving me a longer tranny life. I should run into any problems going from regular oil to synthetic in the tranny will I?? Its a 2000 v8 sport