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I was consistently getting 30 miles per gallon on the highway at 65 miles per hour during many 500 mile trips between homes. Then, I had an engine tune up because I detected a slight roughness in the idle. Mileage was still good. I had new plugs and wires. Bad idea. Now my highway mileage is 22 miles per gallon and the engine knocks badly. It was a 91 Deville with 4.9 engine and 75,000 miles on it. I guess I should have taken it to the dealer for the tune up.
What else can I help you with?
Oil change 1996 Cadillac DeVille?
how many quarter i can add if i want make oil change for cadillac deville sedan 1996
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where is the dip stick at located in 1996 cadillac deville ?
What is the normal coolant temperature 1996 cadillac deville?
Whats the normal temp for 1996 Cadillac devlle
Will new Cadillac deville rims fit an old 1996 Cadillac?
yes
How do you replace the heater core on a 1996 Cadillac Deville?
how do you change the heater core on a 99 cadillac deville? I need to know, "Kaiser."
Will a 1994 Cadillac DeVille transmission work in 1996 Cadillac DeVille?
Yes, if they are both Concours (8th number in the VIN is "9"), otherwise no.
What isOperating temperature for a 1996 Cadillac Deville?
i heard its 185
What is wrong with a 1996 cadillac deville if it starts but dies out?
oh
Will 20 rims fit on a 1996 cadillac deville?
yes
How do you remove the factory radio from your 1996 cadillac deville?
you eat it
How do you install Spark Plugs and wires on a 1994 Cadillac Deville Concours?
How can I change the wiring and spark plugs on my 1996 Cadillac Sedan Deville Concours?
How many oxygen sensors on a 1996 Cadillac sedan de ville?
I have a 1996 cadillac deville concours, an it has 4 oxygen sensors
