1990 Cadillac DeVille Q&A

1990 Cadillac DeVille Question: my newly bought used 99 Deville,73kmileage gulped 5L in just around 1o Miles.

The engine drives smooth, the temp ranges between 204-225. The gas was empty from the dealer, so I gased up 5L and by the time it covered like 10 miles,the gas meter signals empty. Is this normal consumption or terribly odd? What can I do please. -
Answer 1
hmmm.........5L = 10 miles...so....1 gallon = 8 miles....not good. perhaps you should monitor your fuel consumption more diligently...it should be about 15 miles to the gallon. -