What should determine the frequency of servicing cooling systems in vehicles?

The frequency of servicing cooling systems in vehicles should be primarily determined by the engine manufacturer's recommendations. Manufacturers design their engines with specific parameters in mind, including the type, amount, and age of coolant, as well as the service intervals for maintenance tasks. Following these guidelines ensures that the cooling system operates efficiently and effectively, helping to prevent engine overheating and failure due to coolant degradation or leaks.

While advice from a mechanic, government regulations, and standard industry practices may provide additional guidance or context, they should not replace the manufacturer’s specific recommendations. Mechanics are trained professionals, but their advice may vary based on experience or personal opinion rather than adhering strictly to manufacturer guidelines. Government regulations can influence general safety and environmental standards, yet they don't typically specify the technical details needed for maintenance frequency. Standard industry practices can offer a baseline, but they may not reflect the nuances of each unique engine design, which the manufacturer specifically addresses. Thus, to ensure optimal vehicle performance and longevity, referencing the engine manufacturer's recommendations is key.