Chevrolet customer relations manager says Bioperformance Gas Pill product may void car warranty.
Jennifer Vera, customer relations manager, said, in part:
“Chevrolet does not recommend … adding additives such as the BioPerformance fuel pill after (a vehicle) has left the assembly plant.
“Changes may adversely affect the vehicle and possibly result in operational problems. This could result in the voiding of specific items covered under the … warranty.