MAINTENANCE SCHEDULE

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ACCORDING TO THE MAINTENANCE BOOK THA CAME WITH MY CAR. MAINTE700 MILES OR 7500 MILES... I CALLED AND THE SHOP ADVISOR SAID I SHOULLD HAVE IT DONE EVERY 3700 MILES... I TOLD HIM THE BOOK ALSO SAID TO DO IT AT 7500 MILES... I THINK THEY ARE JUST TRYING TO GET MORE SERVICE CALLS.. AM I CORRECT IN ASSUMING THAT THE 7500 MILE SCHEDULE WOULD BE ALRIGHT...I THINK THEY ARE TRYING TO MILK THE CUSTOMER TO INCREASE THEIR PROFITS AND HOW SAY YOU