Gas Mileage

[BNaylor]

Thats pretty good overall if you are doing a lot of in city or combination mixed highway. The best test for mileage is when you take a long trip. The DIC reading will pop above 30 mpg and the average will be much better. On regular trips up to 500 miles one way and 1000 miles round trip I average around 28-30 mpg in my GS but it will vary, of course.

Every little bit helps so it is good to keep the car in tune. Not just plugs but new fuel filter, PCV valve and air filter. On the issue of air filters I get the best mileage with the OE AC Delco drop in air filter versus any other aftermarket brands.

[eccs19]

Ya, I thought that was pretty good also. I wouldn't consider it city or highway driving. Mostly short runs on secondary roads. When I was on a longer stretch, I switched to the instant mileage, and it was going as high as 36mpg. I figure on straight highway, 30 mpg is not unreasonable to expect.

Thanks for the tip on using the OE filter. I wouldn't have expected that.

[SuperFudd]

Hi all,

I have run the mpg test on my wifes '96 Regal to see if it can match my '94 Plymouth Sundance which gets 27-28 mpg commuting between Union City and Sunnyvale in the San Francisco South Bay area.
IT DOES! One week of commuting, 216 miles, got me 30.3 mpg. ;>
It is mostly freeway with allot of slow and go. some times stop and slow. The go is usually less than the 65mph speed limit. I suspect I get the best mpg at ~50mph.
So if I can come up with $15,000 I may buy a '07 or '08 Pontiac Grand Prix with N/A 3.8L with about 15,000 miles on it. Fortunately most folks are looking for 4 cylinder compacts andd consider Grand Prixs as gas hogs so they are rather cheap.

Don

[eccs19]

Just thought I would give some new info. I drove from Toronto to Troy Michigan last week, and here is the mileage I got. Going down, I got a little better than 27 mpg, but the first part of the tank was not highway driving. On the way back I got almost to 28.5 mpg, and the first hour of the trip, I was stuck in traffic, so overall I don't think I did that bad. This is with the car not yet having a tune up.

[BNaylor]

Originally Posted by SuperFudd

So if I can come up with $15,000 I may buy a '07 or '08 Pontiac Grand Prix with N/A 3.8L with about 15,000 miles on it. Fortunately most folks are looking for 4 cylinder compacts andd consider Grand Prixs as gas hogs so they are rather cheap.

Don

IMO not that cheap. I'll keep my '97 Grand Prix GTP until it falls apart. Also, FYI the '04 and up with the Series III 3800 engines do not appear to get as good fuel economy as the earlier generation with the Series II 3800 engine.