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What is the fuel mileage on a 1989 Chevy suburban with 454 TBI?
Wiki User
∙ 14y ago
I have an '89 350 Suburban and get bout 15 MPG.
Actually, it uses about 4 gallons an hour, pretty much no matter what I'm doing. Going 70 down the road or doing 30 in town at stop and go. Obviously, I use fewer gallons per hour at idle.
Wiki User
∙ 14y ago
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