Frequently Asked Questions

You have Questions. OEM has the answers.

OEM understands there’s a lot to know about maintaining your vehicle’s cooling system. Choosing the right antifreeze/coolant for your particular vehicle is a great start. Here are a few commonly asked questions to help guide you through the correct use of OEM antifreeze/coolant.

  • Q: What is the shelf life of OEM antifreeze/coolant?

     A: If the product is still in the original sealed container or has not been diluted with water then it has a shelf life of many years.
  • Q: What does OEM mean?

     A: OEM stands for original equipment manufacturer. Traditionally, it is a company whose products are used as components in the products of another company.
  • Q: When should I replace my antifreeze/coolant fluid?

     A: In general, follow your OEM’s (Original Equipment Manufacturer) guidelines. If you do not have a guide and are using traditional coolant, then change every two years. Extended Life Antifreeze/Coolant should be changed every 5 years or 250,000 km.
    It is important to note that you should check your coolant system at least twice a year. If the coolant is dirty, cloudy, or full of particulate, then the coolant system should be drained, flushed, cleaned, and refilled with a prediluted good quality coolant and the reason for the poor condition of the coolant should be determined.
  • Q: Why can’t I use straight coolant instead of diluting it? Wouldn’t more coolant give me better protection?

     A: Because it will freeze. The freeze point of undiluted coolant will only be 8.6°F (-13ºC), causing you to have potential freeze point problems in the wintertime. Also, too much corrosion inhibitor could lead to inhibitor fallout, especially in those cases where SCAs (supplemental coolant additives) are added.
  • Q: Why do the directions state that distilled, deionized, or soft water should be used to blend coolant?

     A: Some coolants are sensitive to hard water, which can cause some corrosion inhibitors to form insoluble salts in the water. The result is premature coolant failure. Hard water salts will deposit on hot areas within the coolant system creating insulating films, which contribute to overheating problems in the coolant system.

    Deionized water is highly recommended for flushing your cooling system and diluting engine antifreeze/coolant because it is purified water; it doesn’t contain any mineral ions such as sodium, iron, copper and chloride that can cause corrosion. Deionized water reduces corrosion in the cooling system and helps to decrease maintenance requirements of engine radiators. Using this purified water in the vehicle’s system provides protection against the damaging effects of scale build-up and corrosion caused by the use of regular tap water.

  • Q: What is the recommended dilution ratio of your OEM coolant products and what is the protection level I can expect?

     A: Each product label has the following information for dilution ratio and protection level:
    • 50% antifreeze (50% water)
    • 60% antifreeze (40% water)
    • 70% antifreeze (30% water)

    Protection against freezing (°C/°F) -37/-34   -52/-61°F   -64/-83
    Protection against boil-over (°C/°F)** 129/264   132/269   136/276

    **with a 100 kilopascal (15 psi) radiator cap in good condition

  • Q: Which antifreeze/coolant, prediluted or concentrate, is the best option for my vehicle?

     A: For extreme temperatures, mixing a concentrate coolant with deionized water is the better option because maximum freeze protection of -64°C/-83°F can be achieved with a 70/30 mix (coolant to water). It is also best used when completing a system flush. Since residual water always remains in the system even after a flush, the 50/50 premixed coolant is great for top-ups.
  • Q: What is an OAT coolant?

     A: Our OEM Extended Life Antifreeze/Coolant is an Organic Acid Technology (OAT) engine coolant. It is an engine coolant that is based on fully neutralized organic acid corrosion inhibitors. These corrosion inhibitors last longer than traditional corrosion inhibitors, and this is why OAT coolants are typically long life products. These coolants do not contain phosphates, borates, silicates, etc.