The castability of ce alloy is comparable to that of aluminum-silicon alloys, which is very easy to process, and the stability of intermetallic compounds eliminates many heat treatment links. The heat resistance of aluminum-cerium alloys is more suitable for internal combustion engines. Measurements show that the new alloys remain stable at 300°C (572°F), the temperature at which traditional alloys have begun to melt. Additionally, the stability of the new alloy reduces the need for heat treatment. Aluminum-cerium alloys can not only directly improve the fuel efficiency of the engine through operating temperature, but also through the use of small aluminum base components or the use of aluminum alloys instead of cast iron in light engines such as cylinder blocks, transmissions and cylinder heads.