LeSabre V6-3.8L VIN K (1996)
Fillpipe Restrictor: Description and Operation
FILLPIPE RESTRICTOR
A small diameter fuel tank filler tube is used on catalytic converter equipped vehicles to prevent the larger service station pump nozzle, used for
leaded fuels, being inserted into the filler tube. Since the use of leaded fuels contaminates the catalyst, rendering them ineffective, the use of
unleaded fuels is mandatory in catalytic converter equipped vehicles.