Coolant FAQ

Q. WHAT IS A FILL-FOR-LIFE PROGRAM?
A. FILL-FOR-LIFE is an extended service interval (ESI) coolant program. The coolant’s life is extended to correspond with the life of the engine.

Q. HOW DO I GET STARTED?
A. Read Preventing Cooling System Problems with the FILL-FOR-LIFE program, or contact your local sales representative.

Q. WHO MAKES PHOSPHATE-FREE TMC RP-329 SPECIFICATION ANTIFREEZE?
A. Many heavy-duty parts suppliers carry this antifreeze, below are some of the name brands.
Caterpillar Diesel Engine Antifreeze/Coolant
Detroit Diesel PowerCool
Fleetcharge
Quaker State Antifreeze
MacGuard 2792
Prestone Heavy-Duty
Sierra (propylene glycol)
Several high quality recycling services who use reverse osmosis, distillation or ion exchange.

Q. WHERE CAN I GET PRODUCTS?
A. From any of 80 independent Penray Power Fleet Warehouse Distributors or from these national OEM distribution sources:
Kenworth dealers
Peterbilt dealers
Navistar dealers
Freightliner dealers
Detroit Diesel dealers

Q. WHAT BENEFITS DOES THE FILL-FOR-LIFE PROGRAM PROVIDE?
A. There are several important benefits:

  • Most of the standard factory-fill antifreezes in today’s trucks meet the TMC RP-329 specifications, so you don’t have to change your new coolant or pay extra for a factory option.
  • Your program will be compatible with other, older technology antifreezes, so you can use the new antifreeze in your older cars and trucks or buy antifreeze on the road in a pinch without creating a cooling system catastrophe.
  • If your system becomes diluted or contaminated you can fix it with your RP-329 antifreeze and/or Pencool 3000. You don’t have to throw the contaminated coolant away, and you don’t lose the extended service benefit. You can easily test your system with Penray 2-Way Test Strips or inexpensive laboratory analysis to be sure its in good shape