Interview With Mark Nyholm on Diesel Injector Cleaner Ed Newman|Apr 15, 2016 1:17 PM (Reposting July 2020) Skipping Diesel Fuel Additives are a Mistake Mechanical engineer Mark Nyholm is a diesel enthusiast who is truly happy to have found a career working with something he loves. Mark is Technical Product Manager – Heavy Duty here at AMSOIL, a position […]