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Interesting thread. I keep track of my gas milage on an excel spreadsheet (along with my oil changes and other maintenance since mid-2004) and I think it's a really good tool to evaluate not only your MPG, but also the performance of your car when you do certain things. Like changing the oil will automatically give me at least a 1/2 to 1 MPG better. Also, based on my numbers you can tell when gas stations start switching to their summer gas as my milage will pick up with that as well.
Another interesting stat I keep is the total number of gallons used for the year and the average MPG for the year. For example I drove 14,625 miles in 2007 and used 645.794 gallons for an MPG of 22.647. I have an '01 Grand Prix that is rated for 30 (H) and 20 (C), so I am pretty content getting about 26-28 MPG on the highway taking it easy and cruising at 74-77.
I think seeing the number of gallons you use in a year and the actual milage you get is a good tool to figure out what works and what doesn't. Is it a perfect system, probably not, but close enough to get the main idea.
"Difficult takes a day, impossible takes a week." Jay-Z
I get 21 to 22 mpg on my Kia Sephia 90% city driving.I use to get 19 to 20 mpg until I switch to top tier gasoline which is Shell in my area. If they dont advertise cleaners in there gas I dont use it. If I got to spent $4.00 per gallon for gas its got to be the best. In my area top tier gas cost the same as low detergent gasoline.
.....Now's the time to double check air pressure in the tires (maybe even run 1 or 2 psi higher than recommended), make sure the engine is properly tuned, spark plugs are in good shape, fuel filter is clean, etc. A few years ago when our '92 V6 Camaro was sort of neglected it was returning a paltry 17mpg in mixed driving. A major tuneup, done in the garage by yours truly (new O2 sensors, spark plugs, ignition wires, distributor cap, rotor, timing adjustment, etc) and the same car is now routinely giving 22mpg. Amazing!!
We get 36-37mpg out of our Neon and I get 16-17 out of our Yukon.
I mirror what Mike said about tune ups. Remember, there is more than changing the oil. I was only going to add Air filter. Do the tuneups recommended by the manufacturer. Use quality parts, spend a little more now instead of cheaper more frequently. O2 sensors go bad, not right away and throw a light, they go bad slowly and effect your mileage. If you have a lift or bigger tires, have the computer checked and speedometer gears checked to compensate, your mileage may not be accurate because of your tire/lift size. Automatics, check your fluid. I change my fluid every year, dump the pan and change the filter (get about 6-8qts out of it). Easy job to do in the driveway. Grease those fittings unless your chassis is sealed.
When going out of town to shop, I plan my day and go to stores in a direction so I don't go back and forth across town and back etc.
Also, use good fuel, most of the fuel is brought from a few refineries, it's the station that you should be concerned about (my dad's cousin worked for Chevron and a neighbor worked for Texaco and said the same exact thing). If the tanks are bad or have water in them or....if you know that they are stiffing you (like selling a gallon but not getting a gallon) then your mileage will go down obviously.
and of course, wax those babies and keep them slick and have low drag
L8R
Aaron
Philippians 2:14 - Do all things without grumbling or questioning,
so far I am getting 23mpg 60% freeway 40% city driving, and am paying $4.46 for premium gas. I commute 60 miles/day, almost $10/day for the gas.
I try not to use boost, shift low rpm..etc
I'm in the low to mid 20's with my Jetta. It has the VR6 engine and wants to run on Premium. Still with that being said I wouldn't trade it for the 4 cylinder as the VR6 has a LOT more power and torque. Maybe for the 1.8 turbo but never for the 2.0 non turbo.
Built LQ9, 11:1 comp ratio, edelbrock heads, comp cam, etc etc. Should be about 400hp. Haven't dyno'd it yet. Its getting about 9mpg as a daily driver.
If its fast, loud, and runs on a flammable liquid...count me in.
This thread makes me feel better. I am averaging about 22-25MPG in my '03 GT Mustang with about 80% highway driving. I am in the middle of a test (no shift over 2,500 rpms, no cruising past 70 mph, no wot) on this tank to see how much better I can get it! I am hoping to get 27 MPG and will be doing some MPG based mod's to get even more efficient. All of this and I still have a 260+hp Muscle car!
2005 Cadillac STS with Northstar V8 gets a steady 15MPG to and from work on surface streets and around town shopping. Cruising on the highway a week or so ago and it was over 27MPG averaging about 60MPH along the back roads. Too comforable and smooth to consider trading for a smaller vehicle.....until we hit $10 a gallon but hoping they have the Volt rolling by then.
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