Before the engine is damaged what average life span of an on a 1994 Oldsmobile 88 Royal LSS if maintained properly?

With proper maintenance, a 1994 Oldsmobile 88 Royal LSS engine could reasonably be expected to last 200,000 to 250,000 miles or more before needing a major overhaul. However, this is just an estimate. Actual lifespan depends heavily on several factors:

* Maintenance Schedule: Regular oil changes, filter replacements (air, fuel, transmission), coolant flushes, and other scheduled maintenance are crucial. Neglecting these will drastically shorten engine life.

* Driving Habits: Aggressive driving, frequent short trips (which prevent the engine from reaching optimal operating temperature), and towing heavy loads all put extra stress on the engine.

* Environmental Conditions: Extreme heat or cold can accelerate wear and tear.

* Quality of Parts Used: Using low-quality replacement parts during maintenance can lead to premature failure.

It's not uncommon to hear of these engines lasting even longer than 250,000 miles with meticulous care, but 200,000-250,000 miles represents a realistic expectation for a well-maintained example. Beyond that, you're pushing your luck and facing increasing probability of needing major repairs.