I just went in for my 20K service but they reccomended I have the fuel injection/throttle body done due to carbon and dirt build up.... I really was suprised to hear that but had it done anyway. Is there any reason I should have that problem at 20k or were they just riding me? I always pump 87 but do you guys ever put 93 in? Is it harmful to do so?

 

removed carbon from the throttle body? What'd they do, rev the engine?