Isuzu D-MAX 2020 Owner's And Driver's Manual page 721

To prevent the intercooler damage due to freezing of the intercooler coolant and to
protect the cooling system from corrosion, mix the Isuzu recommended coolant and
water at the ratio of 50/50.
Direct use of "50/50 Pre-diluted" product which is already diluted to 50% concentration
is recommended.
ADVICE
• Isuzu does not guarantee the use of the engine or vehicle at the outside
temperature of -30°C (-22°F) or below.
• If the engine or vehicle is used at the outside temperature of -30°C (-22°F) or
below, the coolant concentration of 55% is recommended.
• If the concentration of intercooler coolant is less than 50%, the anti-rust
performance of the intercooler coolant may decrease.
• Because the engine cooling system and the water-cooled intercooler system
share the same reserve tank, use the same brand coolant for both.
WARNING
• Coolant is toxic and must not be ingested. If the coolant is mistakenly ingested,
immediately vomit it and seek prompt medical attention.
• If the coolant gets in your eyes, rinse it off immediately with a large amount of
water for 15 minutes or longer. Also, if still abnormality such as irritation is felt,
seek medical attention.
• If the coolant gets on your skin, rinse it off using a soap with a large amount of
water. Also, if abnormality is seen, seek medical attention.
• For storage, close the cap securely and keep it in a place inaccessible to
children.
• Coolant is flammable, and therefore, it must be kept away from flames and other
heat sources. Coolant also could ignite if it comes in contact with a hot surface,
such as the exhaust manifold. Exercise caution to prevent this from happening.
SERVICE AND MAINTENANCE
Preparing Intercooler Coolant
Recommended Fluids, Lubricants and
Diesel Fuels → Refer to page 6-147
6-45