I have a 1998 Pontiac V6 Grand Prix 3800. It takes $36.00 to fill it with gas mid grade. It takes two days for the gas to run out. I have 112,000 miles with this car. I did a tune up and I have done fuel injector cleaning. I notice on my dash monitor showing low percentage in fuel consumption. Can anyone suggest a solution to this problem ? , How can I set the reset monitor showing the low percentage ? and I did a coolant flush and my low coolant indicator came on. How do I correct this problem?
janiuay123