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One-gallon plastic jug of red-yellow pre-diluted coolant

PRESTONE

PRESTONE AFC12100 Antifreeze Coolant 1 gal 50/50 Red Yellow

SKU CH-MRGR-3GKGM

Pre-diluted 50/50 ethylene glycol coolant protects heavy-duty engines to 750,000 miles or 15,000 hours with freeze protection to -34°F and boil-over resistance to 327°F

  • ColorRed, Yellow
  • Pre-diluted 50/50 mix saves time and eliminates measuring
  • Nitrite-free NF-OAT formula protects heavy-duty engines up to 750,000 miles
  • Extended-life rating of 15,000 hours reduces coolant change intervals
  • Freeze protection to -34 °F and boil-over protection to 327 °F
  • Phosphate-free, silicate-free and biodegradable for lower environmental impact

Engine coolant for heavy-duty use

Prestone AFC12100 is a pre-diluted 50/50 antifreeze coolant formulated with nitrite-free OAT technology. It uses an ethylene glycol base that is phosphate-free, silicate-free and biodegradable. The product is intended for heavy-duty cooling systems requiring extended-life protection.

Pre-diluted bottle removes mixing steps

The one-gallon container arrives at the correct 50/50 concentration so no water addition or measuring is required. Its red and yellow colour helps identify the fluid during inspection or top-up. The bottle format allows direct pouring into the cooling system without extra equipment.

Temperature range defines operating window

Freeze protection is rated to -34 degrees F and the boiling point reaches 327 degrees F under system pressure. Service intervals are limited to 15,000 hours or 750,000 miles, after which the coolant must be replaced. Systems that exceed these limits will lose the advertised protection.

Highlights

  • Pre-diluted 50/50 mix saves time and eliminates measuring
  • Nitrite-free NF-OAT formula protects heavy-duty engines up to 750,000 miles
  • Extended-life rating of 15,000 hours reduces coolant change intervals
  • Freeze protection to -34 °F and boil-over protection to 327 °F
  • Phosphate-free, silicate-free and biodegradable for lower environmental impact

Specifications

BrandPRESTONE
ColorRed, Yellow

Questions about this item

How often will the pre-diluted 50/50 coolant need to be replaced in a heavy-duty engine?

The fluid carries a lifetime rating of 15,000 hours or 750,000 miles, so replacement is scheduled around those intervals.

What temperature limit is reached first during continuous high-load operation?

The coolant boils at 327 degrees F, which is the upper thermal boundary before phase change occurs.

How much heat and vapour does the ethylene-glycol blend release when the engine runs all day?

With a boiling point of 327 degrees F and a freezing point of -34 degrees F, the mixture remains liquid and stable through extended duty cycles.

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