Hello, I am working in the Fuel Injector supply industry. I am wanting to know of Peterbilt and Kenworth owner operators and fleet operators who have had issues with injector deposits, and if you have had success with the fuel flush cleaning process? This would be for any MY21+, MX11 and MX13 engines. We would like to get information on the geographic area the truck has been operating in and refueling in. If you can reply to this email, I will contact you directly.