Cadillac Seville poor miles per gallon issue with suggestions for improvement on Cadillac Seville

Some Cadillac Seville owners report experiencing poor miles per gallon due to several factors. Many find that aggressive acceleration and braking significantly increase fuel consumption, suggesting that stable driving habits can help optimize fuel efficiency. Additionally, using the recommended fuel is crucial for achieving optimal fuel consumption. Some owners have noted low fuel pressure under load, which may indicate a fuel supply issue stemming from a collapsed or restricted fuel filter, prompting the need for inspection. Regular maintenance, including checking and replacing fuel injectors, is also vital; however, some users have reported continued poor mileage even after injector replacement, indicating the necessity to explore other potential causes. If issues persist, it is advisable for owners to have a mechanic inspect the vehicle for underlying problems affecting fuel efficiency, such as fuel system or engine issues.