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Old 04-09-2015, 01:33 PM   #1 (permalink)
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New with a 2000 Sunfire

Just joined and have a 2000 Sunfire. Want to get the fuel economy up as currently it is under 30 MPG. I have changed oil (non synthetic, as i have a small leak), Tires are at max pressure, and recently had the subframe, fuel filler tube, LR strut, and muffler replaced. (Now have a high piched whine at 3000rpm since muffler change).

What suggestions does one have to help with increasing the MPG?

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Old 04-09-2015, 01:41 PM   #2 (permalink)
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Welcome. Is you mileage lower than it used to be? If you're just looking for tips on driving style click here.
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Old 04-09-2015, 01:49 PM   #3 (permalink)
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I bought the car ~2 months ago. I used to own a 98 sunfire that sipped the gas, but this one seems to inhale it. I also owned a 09 cobalt that did better on gas than this sunfire.

The 98 was a 2 door with no AC and a 5 speed, and no options

The 00 is a 4 door with AC and a 4 speed auto with most options.

I know the Manual makes a difference, but i wouldn't think it would be that huge.
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Old 04-09-2015, 01:50 PM   #4 (permalink)
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Welcome to the site. Auto or manual transmission? The auto is hard to get good mileage in, I had an automatic 97 Sunfire that I struggled to top much more than 30 mpg in during summer, in winter no way.
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Old 04-09-2015, 01:57 PM   #5 (permalink)
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Quote:
Originally Posted by Daox View Post
Welcome to the site. Auto or manual transmission? The auto is hard to get good mileage in, I had an automatic 97 Sunfire that I struggled to top much more than 30 mpg in during summer, in winter no way.
Auto 4 speed.

I am reading your thread now about your '97 Sunfire.
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Old 04-10-2015, 08:47 PM   #6 (permalink)
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I filled up today. 12.14 gal on 301.6 miles. Averaging 24.8 MPG.

Want to get the car to 30 MPG.
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Old 04-10-2015, 09:48 PM   #7 (permalink)
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The main key with mine was getting the torque converter to lock up. For me, that meant I had to be going 45 mph or higher. Below that mileage was horrible.
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Old 04-10-2015, 09:51 PM   #8 (permalink)
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My commute is ~15 miles one way with the speed limit between 55 and 65 mph.

24.8 mpg is not much worse then the cobalt was at ~27.

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