Port Injection System - Gasoline Recommendation
Number 87-6 (Gasoline)-47 Date 6/87Subject: GASOLINES MARKETED AND ADVERTISED TO KEEP PORT FUEL INJECTORS CLEAN
ALL MODELS WITH PORT FUEL INJECTORS
As a reminder and to ensure that GM customers have sufficient flexibility in selecting gasolines for their vehicles with port fuel injected engines, urge your customers to purchase gasolines marketed and advertised to keep port fuel injectors clean (refer to bulletin 86-6 (Gasoline)-6). Also, please disregard the earlier list of gasoline brands (refer to bulletin 86-SM-18A) because it is incomplete now that all major brands as well as many independent brands appear to be treated with detergent additives.