In heavy stop-and-go traffic or extreme heat, many technicians recommend a "drain and fill" every 30,000 miles to ensure the longevity of the belt system.
Let's say we have two numbers, 4 and 6.
OEM Honda HCF-2 is typically amber/yellow , similar to engine oil. Some equivalents like Castrol are red, which can make leak detection easier but might be off-putting to purists. When to Change Your HCF-2 Fluid hcf-2 equivalent