Originally posted by mazdamazda
ghost / niky,

how can you measure the bad side effects of a lean burning engine? compression testing? dyno run?
measure the bad effects?

Do a long hard drive. Capture a sample of the exhaust gasses during the drive. Test the exhaust gasses for increased NOx emissions. Open the engine block and do a visual and microscopic inspection of the piston heads for damage.

A dyno run will simply show less HP.

Compression test will show nothing unless damage is severe enough already.