* Year of Manufacture: Engine technology and build quality varied across the Century's production years (roughly 1973-2005). Older engines generally have shorter lifespans than newer ones, assuming equal maintenance.
* Engine Type: The Century used various engines over its lifespan (V6s and V8s are common). Different engines have different inherent strengths and weaknesses affecting longevity.
* Maintenance: Regular and proper maintenance is crucial. Oil changes, filter replacements, and addressing issues promptly significantly impact engine life. Neglect leads to premature wear and failure.
* Driving Habits: Aggressive driving, frequent short trips (preventing the engine from reaching optimal operating temperature), and towing heavy loads all contribute to faster wear.
* Environmental Conditions: Extreme temperatures and harsh climates can accelerate engine degradation.
While some Buick Century owners report reaching 200,000 miles or more with proper care, others might experience problems much sooner. A reasonable expectation with good maintenance might be in the 150,000-200,000 mile range, but this is just a broad estimate. Beyond that, it's largely a matter of chance and how well the car was cared for.
