Gas Mileage Difference
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Gas Mileage Difference
I have a '97 SE with the standard 3.8. no upgrades. all stock. i get about 280 miles to the tank, about 17 to 18 mpg on average from what i can figure. all in town driving. I found a '97 SSEi with standard supercharged 3.8 on my local craigslist and he said his car got about 480 miles to the tank. Why such a big difference? and especially since his car is supercharged and should be getting worse gas mileage? just wonderin. (not sure if this is correct forum to place in?)
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It all depends on how you drive. I'm getting about 18 mpg right now. When I drive easy and it'* summer I can get about 27 mpg. There are several things that can effect millage. Air filter, spark plugs, spark plug wires, MAF, O2 sensor. Also, a supercharged engine uses premium gas and can get better millage from that. I get about 2 or 3 more MPG with 93 oct.
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Seems you should be able to get better than that around town. Air filter, plugs, and wires all up to snuff? As for the 30MPG average in a 97SSEi, I call bullshit LOL. I think he'* a ranking your chain. With the V8, I get 10-14 cruisin, 17-18 civil intown driving, 23-24 Highway w/cruise on.
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im in the process of doing a tune up on my car. air filter, oil change, plugs and wires, and possibly coils on the list. and i was kinda thinking bs too. i could see if it was around 100 miles more but 200+ miles more when his motor is supercharged and mine isnt is a little questionable.
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ive been havin some problems with mine. thats my post about it all.
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Changing and maintaining your fluids, changing the plugs and wires will also help a lot. New coils will also help if your old ones are getting tired. But don't forget about that O2 sensor. That'* one of the sensors used to tell the computer how much fuel to pump. Clean the MAF as well. This also tells how much fuel to pump. A tired old O2 sensor will cause yoru millage to drop over time. I think I added close to 4 or 5 mpg when I changed it out. Just do NOT get a Bosch O2 sensor. They have proven to not last.
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I have a 97 Bonneville SE and I average 18-20 mpg in the city, and 25-28 on the highway. That was after gutting the airbox, new fuel pump, new fuel filter, new plugs, new wires, and of course a new air filter. I took the car round trip to Denver CO from Kansas City MO and I got 350+ miles to the tank.