My service engine soon light came on the other day, however the car was running just fine. I filled the tank with Shell gas, took the car out on the freeway and drove it at 90 mph for a good distance. The light went off and the car is running great and the light is still off!

 

You did the right thing. As Carrol Shelby told Bill Cosby (on his album 200mph), you gotta take it out and burn the gunk out of it now and then.

 

Nothing like a well done Italian tune-up to make things right.