My Kia dealership insists my car needs a fuel-induction service once a year. Friends tell me it is not necessary, that it's a waste of money and simply a profit generator for the dealership. True? – ...

Dear Tom and Ray: The local Honda dealer charges $120 for a fuel-induction service every 30,000 miles. I can buy a can of BG 44K injector cleaner as a gas additive for $20. Does the gas-additive ...