AMSOIL Propylene Glycol Antifreeze and Engine Coolant
Engineered to exceed original equipment manufacturer (OEM) and ASTM D3306 requirements. Provides protection for up to 150,000 miles (240,000 km) or 5 years, whichever comes first, in passenger cars and light trucks; up to 1,000,000 miles (1,600,000 km), 20,000 hours of operation or 8 years, whichever comes first, in heavy-duty applications. Provides freeze protection down to -34°F (-36°C) and boil-over protection to 265°F (129°C) with a 15-psi radiator cap. Protects all cooling system metals, gaskets, and hoses. Compatible with all other antifreeze and coolant colors.
Add an AMSOIL Preferred Customer membership to the same cart to unlock up to 25% off qualifying products. Existing members can sign in, and qualifying orders currently over $100 can ship free.
Product data sheets
View, download, or save a copy of the Product Data Sheet or Safety Data Sheet for AMSOIL Propylene Glycol Antifreeze and Engine Coolant.
AMSOIL Propylene Glycol Antifreeze and Engine Coolant
AMSOIL Propylene Glycol Antifreeze and Engine Coolant (ANT) is a propylene glycol-based hybrid organic acid (HOAT) coolant concentrate engineered to exceed original equipment manufacturer (OEM) and ASTM D3306 requirements. The formula serves owners who need a propylene glycol coolant in place of conventional ethylene glycol formulations across passenger cars, light trucks, RVs, marine engines, stationary generators, and heavy-duty equipment. Mixed 50/50 with distilled or high-quality water, the coolant delivers freeze protection down to -34 degrees F (-36 degrees C) and boil-over protection up to 265 degrees F (129 degrees C) when paired with a 15-psi radiator cap.
Propylene glycol HOAT chemistry
The base fluid is propylene glycol rather than the ethylene glycol used in most conventional automotive coolants, paired with a proprietary hybrid organic acid (HOAT) inhibitor system. Propylene glycol is the glycol family commonly chosen for RV plumbing, marine engines, and other environments where a different acute exposure profile is preferred. The HOAT additive package is fully charged at fill, so no separate supplemental coolant additives (SCAs), nitrite extenders, or recharging are required between scheduled drain and refills. Compare propylene glycol and ethylene glycol coolants in detail in the Non-Toxic Antifreeze Guide.
Corrosion and erosion protection across mixed metals
Cooling systems combine aluminum heads and water pumps with cast-iron blocks, copper and brass radiator and heater cores, lead-tin solder joints, and steel hardware. Independent testing shows the formula achieves nearly perfect scores in ASTM corrosion and erosion testing on cast aluminum cylinder heads, steel, copper, solder, brass, and cast iron and aluminum water pumps. The proprietary organic acids form a protective layer on metal components and the formulation greatly surpasses standards for metallic corrosion and erosion.
Anti-scale design
The formula omits the phosphate, nitrate, nitrite, silicate, borate, and amine compounds responsible for almost all scaling issues in conventional antifreeze and coolants. Those compounds commonly react with calcium and magnesium in tap water to form precipitates that adhere to metal surfaces and create scale and corrosion, and they can also drop out when coolant pH drifts or incompatible products are mixed. AMSOIL Propylene Glycol Antifreeze and Engine Coolant virtually eliminates scaling problems and stays much more resistant to deposits when calcium and magnesium are inadvertently introduced through tap water.
Cylinder-liner cavitation and pitting protection
Wet-sleeve diesel engines depend on coolant chemistry to suppress the high-frequency vapor bubbles that pit and erode cylinder liners. AMSOIL Propylene Glycol Antifreeze and Engine Coolant protects cylinder liners against cavitation erosion and corrosion pitting without nitrite technology, which can cause aluminum corrosion and is being banned from coolants by a growing list of heavy-duty and automotive manufacturers. Performance is qualified in ASTM D7583, the John Deere cavitation test, where the formula performs extremely well.
Long service life and broad coolant compatibility
The neutral yellow concentrate is compatible with all ethylene and propylene antifreeze and coolant colors, with all plastics and elastomers including hoses and gaskets, with fully formulated diesel antifreezes, and with other organic acid technology (OAT) and hybrid organic acid technology (HOAT) formulations. Mixing propylene-glycol and ethylene-glycol formulations can make freeze-point prediction unreliable, so a complete cooling-system flush at the next convenient service interval is recommended after any unavoidable cross-glycol top-off.
Recommended applications and service intervals
AMSOIL Propylene Glycol Antifreeze and Engine Coolant is suitable for any domestic or import passenger car, light truck, or heavy-duty application requiring any of the following industry, OEM, or trade-association specifications.
Industry and trade-association: ASTM D3306, D6210, D7583, and D7820, plus TMC RP329B, TMC RP338, and AS/NZS 2108.2004 Type A.
Heavy-duty diesel and equipment: Cummins 14603 and 3666132, Detroit Diesel 7SE 298 and 93K217, Mack 014GS17004 and 014GS17009, MAN 324 NF, MTU MTL 5048, Scania TB1451, MB DBL 7700 and MB-Approval 325.3, Volvo Heavy Truck, Navistar International CEMS B-1 Type III-A, JIS K2234, and Case New Holland.
Truck and chassis: Freightliner 48-22880, Kenworth RO26-170-97, PACCAR CS0185, Peterbilt 8502.002, DAF MAT 74002, and GM Heavy Truck.
Service life: follow the current AMSOIL product page, the equipment manual, and coolant condition checks for the application.
Mix the concentrate with distilled water or high-quality water containing less than 100 ppm total hardness, and check the antifreeze and coolant mix freezing point after blending. Do not remove the radiator cap when the engine is hot, and dispose of used antifreeze and coolant per local regulations. Outside the United States and Canada, follow the engine and equipment manufacturer cooling-system recommendation. Verify the engine and equipment specification with the AMSOIL Vehicle Lookup Guide before draining and refilling.
Typical technical properties
Property
Value
Glycol type
Propylene glycol
Inhibitor chemistry
Hybrid organic acid (HOAT)
Concentration
Concentrate, mix 50/50 with distilled or high-quality water
Boiling point at sea level (40, 50, 60 percent antifreeze)
219, 222, 225 degrees F
Boil-over protection with 15-psi radiator cap
Up to 265 degrees F (129 degrees C)
Freeze protection (50/50 mix)
Down to -34 degrees F (-36 degrees C)
Service life
Confirm current AMSOIL guidance and equipment-manual requirements before service.
Industry specifications
ASTM D3306, D6210, D7583, D7820; TMC RP329B, RP338; AS/NZS 2108.2004 Type A
Order AMSOIL Propylene Glycol Antifreeze and Engine Coolant
Available package sizes are the gallon jug (ANT1G-EA), case of four gallon jugs (ANT1G-CA), and 55 gallon drum (ANT55-EA). AMSOIL products are backed by the AMSOIL Limited Warranty. Match the right coolant for the vehicle or equipment with the AMSOIL Vehicle Lookup Guide, then review propylene glycol versus ethylene glycol chemistry, pet exposure considerations, spill cleanup, and OEM compatibility in the Non-Toxic Antifreeze Guide before ordering. Order Now.
What is propylene glycol antifreeze, and how is it different from ethylene glycol antifreeze?
Propylene glycol is the freeze-point depressant and heat-transfer base fluid used in this formulation, in place of the ethylene glycol used in most conventional automotive coolants. Both glycols deliver freeze and boil-over protection. Propylene glycol is commonly chosen for RV plumbing, marine engines, and other applications where a different acute exposure profile is preferred. The Non-Toxic Antifreeze Guide compares the two chemistries in detail.
Is the coolant a concentrate or pre-mixed?
The product ships as a concentrate and should be mixed 50/50 with distilled water or high-quality water containing less than 100 ppm total hardness before installation. A 50/50 mix delivers freeze protection down to -34 degrees F (-36 degrees C) and supports boil-over protection up to 265 degrees F (129 degrees C) when paired with a 15-psi radiator cap. Confirm the freeze point after blending.
What color is the coolant, and is it compatible with other coolant colors?
The concentrate is dyed neutral yellow. The formulation is compatible with all ethylene and propylene antifreeze and coolant colors, with all plastics and elastomers including hoses and gaskets, with fully formulated diesel antifreezes, and with other organic acid (OAT) and hybrid organic acid (HOAT) formulations. Color alone is not a compatibility spec; the engine manufacturer chemistry requirement is.
Can propylene glycol coolant be mixed with ethylene glycol antifreeze for top-off?
Mixing propylene-glycol and ethylene-glycol formulations can make freeze-point prediction unreliable. If a cross-glycol top-off is unavoidable, a complete cooling-system flush and refill with one formulation at the next convenient service interval is recommended.
How long can the coolant stay in service before a flush and refill?
Follow the current AMSOIL product page, the equipment manual, and coolant condition checks for service-life guidance. AMSOIL updates service recommendations as formulas and application guidance change.
Will using AMSOIL Propylene Glycol Antifreeze and Engine Coolant void a new vehicle warranty?
No. Using AMSOIL synthetic lubricants and coolants does not void a new vehicle or equipment manufacturer warranty, and AMSOIL products are backed by the AMSOIL Limited Warranty. Confirm the engine and equipment coolant specification with the AMSOIL Vehicle Lookup Guide or the owner manual before draining the system.
