Which maintenance interval is correct for changing the fuel filter?

Which maintenance interval is correct for changing the fuel filter?

• A. Every 12 months
• B. Every 24 months
• C. Every 3 months
• D. Every 36 months

Answer: (D)

Fuel filters are scheduled for replacement according to the maintenance plan, which for this system uses a calendar-based interval. Changing the fuel filter every 36 months provides a balance between protecting the fuel system from accumulated contaminants and minimizing downtime and unnecessary maintenance. This interval assumes normal fuel quality and no signs of contamination; if fuel quality is questionable or you notice symptoms like reduced engine performance or fuel-system clues, you would address those issues sooner. Shorter intervals would be used only if the manual specifies or if contamination is detected, while longer than 36 months risks clogging or fuel delivery problems.

Fuel filters are scheduled for replacement according to the maintenance plan, which for this system uses a calendar-based interval. Changing the fuel filter every 36 months provides a balance between protecting the fuel system from accumulated contaminants and minimizing downtime and unnecessary maintenance. This interval assumes normal fuel quality and no signs of contamination; if fuel quality is questionable or you notice symptoms like reduced engine performance or fuel-system clues, you would address those issues sooner. Shorter intervals would be used only if the manual specifies or if contamination is detected, while longer than 36 months risks clogging or fuel delivery problems.