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Okay hello everyone I have a question, or concern rather Okay I have a 2005 Chevy Impala and it has unfortunately reached its' 100,000 mile mark. Now since it has reached it's mark it has been drinking alot of gas. I got the plugs changed but it is still drinking alot . I'm trying to see if I go and get the tune up will that alleviate that because in the past my gas lasted a while or at least 3 -4 dys and now it's like by day 2 it's almost on Empty. I also know a lot of gas stations have no good gas but In general I'm trying to find out is that what is causing this and once I get the tune up will I see a significant Difference?
Who changed your plugs, what did they put in? These cars are not hard to service. I personally prefer NGK plugs.
A proper tuneup done by someone who knows what they are doing should improve your MPG.
100K miles is not a lot on one of these if well-kept.
The thinnest grade of synthetic oil that is in accord with what your manual recommends will help MPG a little. If the car does not burn significant amounts of oil and does not leak oil this is worth doing.
Check that your brakes are not dragging, check your tire pressure.
If your fuel filter is original you are lucky that the car runs at all, I have found on FI cars that a clean fuel filter helps MPG as well as all-out power.
If you have not changed the oxygen sensor, it's due as well.
Check you inlet air temperature and your coolant temperature sensors. If either of these is not working properly it could cause your car to run rich and use more fuel than expected. Have somebody with a GM computer check the system.
You didn't mention the air filter. If it can't get air it will use more gas. You might also consider an injector cleaner. A clean injector atomizes fuel and it burns better.
Check ALL of the filters: air & fuel.
Check your air pressure on your tires.
A good tune-up
Brakes properly working
All fluid levels
Change your oil REGULARLY
Act like your going to take this car on an "across the country" road trip w/ your family in it and check everything from one end to the other. Also take out an gear that you might keep in the trunk that can add weight. While all of the kids sports gear might not weigh much by itself it can all add up.
How many miles are you driving per day. What is your gas milage? it would help if we knew this.
IDK.. it's kind of hard to say but I always reset my trip button before I fill up and on average within a week period my trip goes up to about 200 to 300.
Get a small notebook and pen/pencil and put in the car. Next time you fill up, write down the mileage, you can write down the gallons and with the trip meter you can figure out the actual mileage. Or, get a paper receipt, write down the trip meter miles on that. You have to fill the car up when you buy gas if you want to figure mileage. Divide miles by gallons. Probably the easiest way is to use the trip meter for the miles covered between fill-ups. You need to keep the record for at least a few tanks full, reason being is it's hard to get the tank consistently full, you will generally vary by a couple quarts of gas as to how full you get it. One way to get cleaner data is to fill up at the same pump, facing the same way, put the dispenser gun on the same click stop, let it fill up and when it shuts off automatically the first time, don't try to put any more gas in, just put the dispenser gun back and take your receipt. On any kind of lab or measurement work, it's important to minimize uncontrolled variables - anyway end of un-asked-for lab practices lecture....
Trlhiker is 100% correct - without knowing what MPG you are getting, we can't say if this is normal or low for your car.
Around May most of the country started getting 10% ethanol blended fuel, at least a 2% decrease in mileage can be expected with this (crap!)
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Okay I have a 2005 Chevy Impala and it has unfortunately reached its' 100,000 mile mark. Now since it has reached it's mark it has been drinking alot of gas. I got the plugs changed but it is still drinking alot . I'm trying to see if I go and get the tune up will that alleviate that because in the past my gas lasted a while or at least 3 -4 dys and now it's like by day 2 it's almost on Empty. I also know a lot of gas stations have no good gas but In general I'm trying to find out is that what is causing this and once I get the tune up will I see a significant Difference?
