How long will a Subaru Ascent engine last?
The engine in the Subaru Ascent, a 2.4-liter turbocharged flat-four (FA24), is designed for longevity, and with proper care it can last well beyond 200,000 miles. In practice, many owners reach 250,000 miles or more, while some exceed 300,000 miles with meticulous maintenance.
What factors drive engine longevity
Several variables determine how long any engine lasts, especially a turbocharged boxer engine like the 2.4L FA24 in the Ascent. Here are the main factors:
- Regular maintenance and service history
- Quality of oil and oil-change interval
- Cooling system health and thermostat performance
- Turbocharger health and boost management
- Driving style: frequent short trips vs long highway runs
- Environmental conditions and load (towing, hot climates)
- Maintenance of cooling and intake systems to prevent carbon buildup
Keeping these areas in good shape greatly influences how long the engine can run reliably.
Expected lifespan and milestones for the Ascent's FA24 engine
This section outlines typical mileage milestones and what tends to happen as engines accumulate miles, based on ownership reports and manufacturer guidance. Note: individual results vary a lot depending on care and driving.
- 200,000 miles (320,000 km) and beyond: A common benchmark for well-maintained FA24 engines, with many owners reporting trouble-free operation through 200k miles and into the 250k–300k mile range.
- 250,000–300,000 miles (400,000–480,000 km): Achievable for many Subarus with consistent maintenance, clean oil consumption, and no major turbo-related failures.
- Above 300,000 miles: Some enthusiasts report reaching or surpassing this mark; risks increase with age, but proper maintenance and components replacement (timing components, seals, turbo parts) can extend life significantly.
- Warranty and typical repair considerations: Engine wear-related issues on turbo engines may include turbo wear, oil consumption, gasket seals, and cooling system wear; staying ahead with air filter, PCV, cooling system, and oil quality is key. Costs rise as mileage increases, especially if major components are replaced.
Long-term engine life is commonly paired with proactive maintenance recommended by Subaru and third-party mechanics: regular oil changes, using the recommended oil grade, monitoring coolant levels, inspecting the turbo and intercooler, and addressing any coolant/oil leaks promptly.
Maintenance practices that help maximize life
Disciplined maintenance can help ensure the engine lasts longer; consider these actionable steps:
Oil and lubrication
- Follow the owner’s manual maintenance schedule, including oil and filter changes with the specified synthetic oil.
- Use the recommended oil grade and adhere to the suggested interval to minimize wear, especially for a turbocharged engine.
Regular oil care is foundational to reducing wear and prolonging life.
Cooling, turbo care, and air quality
- Keep the cooling system in good shape and promptly address any leaks or overheating.
- Maintain the turbo and intercooler through clean intake and proper heat management; avoid aggressive boosting when the engine is cold.
- Inspect the PCV system and air filters to prevent buildup and ensure efficient airflow.
Healthy cooling and air systems help prevent heat-related wear and maintain engine efficiency over time.
What buyers can expect in practice
For Ascent buyers and owners, a well-kept model can cover long distances with relatively few major repairs. The turbocharged FA24 engine rewards consistent maintenance, attentiveness to oil consumption, and timely repairs. Budgeting for routine maintenance and occasional component replacements becomes more important as mileage climbs.
Summary
With consistent maintenance, the Subaru Ascent's FA24 engine is capable of lasting well beyond 200,000 miles, and many owners reach or exceed 250,000 miles. Achieving that longevity depends on regular oil changes with synthetic oil, proper cooling system care, responsible turbo usage, and adherence to Subaru's maintenance schedule. While individual results vary, the engine is built for durability when cared for properly.
