FAQs Questions: What is diesel fuel? What is premium diesel fuel? What are diesel fuel additives? How can the increased costs of Premium Diesel Fuel be justified? Why Amalgamated, Inc? How do I calculate my needed treat ratio? What does PPM mean? Frequently Heard Terms: Ash ASTM Atomization BTU Cetane Cetane Engine Cetane Improver Cetane Index CFPP Cloud Point (CP) Corrosion Modifiers Crude Oil De-Emulsifiers Deposit Modifiers Detergent Diesel Fuel EGR Valve Emissions Emulsification Engine Deposits Engine Smoking Flash Point Flow Improver Fuel Fuel Stabilizers Fuel System Gasoline Injectors Insoluble Dispersants Jelling (or Gelling) Knocking Lubricity Metal Deactivators Microbial Activity Misfiring NOx Emissions OEM Particulate Content Particulates Pour Point (PP) PPM Premium Diesel Fuel PTB Refinery Rust Modifiers Sludge Stabilizers Sulfur Top Tier Trace Metals Viscosity