Clogged fuel filter, clogged air filter, maybe the mass air flow sensor located in the air intake duct. ( take it to o'Reilly's or to a garage and put a diagnostic computer on it to see what fail codes come up. Mass air flow sensor will give a fail code.) Weak fuel pump?
What is wrong with it?
The 1998 Oldsmobile Intrigue gets an estimated 19 mpg in the city. The vehicle gets an estimated 30 mpg highway mileage.
every 30,000 miles. to be safe.
The Oldsmobile Intrigue does not have a timing belt. It uses gears. For cars that do have a timing belt, about 60,000 miles. But remember than some engines don't use one.
City= 19 Highway= 30 Observed= 22
Apparently it is normal and would make perfect sense. Another contributer on this site stated that the 3.5-liter engine uses about a quart of oil every 1,000 miles. It could be your oil sensor is very sensitive and illuminating to inform you when it only gets a quart low.
Mine gets about 16 / 22 (3.5L engine) but it's also got 115k miles on it and a bad wheel bearing. I have been getting between 25 and 27 mpg, mostly highway driving.
If the 1994 Oldsmobile with the 3.4 liter engine is the Olds Cutlass Supreme, the horsepower is 210. This car gets 19 miles per gallon in the city and 29 mpg on the highway.
If a 1989 Suburban hesitates when accelerating from 45 miles per hour, the carburetor might need cleaned. A clogging can cause surging and hesitation.
78000 miles
Red light means 3 gallons or less. You should be able to go at least 45-60 miles. I'm being conservative here. I'm also assuming the car is operating normally.
About 4.4 miles per liter.