I just got my 03 back from the dealership after experiencing problems with the throttle sticking. They told me to remove the AMSOIL air filter right away, saying the engine can draw oil out of the filter and damage the air flow sensor. They also tossed in that it would be $700 to repair. They also said it had glazed the throttle plate glazed with oil. Is this for real???? Can I clean the throttle plate myself? I have used K & N and AMSOIL filters for years without problems. What you do folks think?