Coolant is an important component in keeping your aluminium engine running properly. Without the right type of coolant, you risk damaging your engine and reducing its lifespan. The good news is there are a variety of coolants that are compatible with aluminum engines on the market today. These coolants come in a range of options, including ethylene glycol-based antifreeze (EGAF) and propylene glycol-based antifreeze (PGAF). EGAF provides better protection against corrosion but can be toxic; PGAF has lower toxicity levels but isn’t as effective against corrosion. Both types should be mixed with distilled water for optimal performance. Additionally, some manufacturers offer specialised “long life” or organic acid technology (OAT) based coolants which contain inhibitors to stop rust build up from occurring inside the cooling system over time and provide extended protection compared to other traditional antifreezes. It’s important to choose the correct type of coolant for your car; always consult your owner’s manual or speak to a qualified mechanic before making any changes or additions to your vehicle's cooling system.