Gas Mileage Sweet Spot

my car a4 76,000 miles is running like dog shit right now haha. I do not dog this car it's babied 95% of the time. I've done the regular oil change every 3 thousand with mobil 1 synthetic. I hear a horrible noise in the rear end sometimes. I had the auburn torsen differential put in it when I ordered it. This one is you experts.. what do I need to do to get it running right again? Got my plugs and wires.. their scheduled to go in ... was told getting the fuel injection system cleaned would help.. I know it's in serious need of a tune up though.. so ideas?

My car gets the best gas mileage when the key is in the "OFF" position and the car is rolling down hill......

So I took my wife/kids on a weekend to the coast. I got into it a couple times with some fellow speed freaks, a camaro, an audi and some dumbass in an acura. I averaged 85 mph, with little spurts up to 110+. The amazing part is, I got 132 miles on 5.3 gallons! Thats almost 25 mpg...amazing. I kept it in 6th, aside for 4-5 donwshifts to get me up to 110+ mph. I can't imagine what kind of mileage I'd get in 6th the whole time.
These cars really are the whole package. I meet kids all the time who say: "my STI will dust you", funny I tell them, your still trying to catch up to a 7 year old car...sad.

BG 44k works wonders, and it will give an almost cam2 boost til you run the tank dry.

what about cam's... i think i can get 200 miles to a tank if im lucky (98 z28)

200 miles on 13-14 gallons, that's what I get too. If I baby her, or do a lotta highway driving I'll get 280+. I can almost hear that LS sucking fuel from the tank when i get on it, like when your McDonalds cup starts to empty.
...these cars are fun.

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Originally Posted by Fbody4ever

200 miles on 13-14 gallons, that's what I get too. If I baby her, or do a lotta highway driving I'll get 280+. I can almost hear that LS sucking fuel from the tank when i get on it, like when your McDonalds cup starts to empty.
...these cars are fun.

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they are the only cars to drive:flex:

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Originally Posted by Finally

Clearly no one ever buys an LS1 Camaro for gas mileage; nonetheless, our cars get excellent highway mileage especially if equipped with a 6 speed. Most people don't believe it when I tell them that my engine is only turning at 1800rpm while going 80mph. Half of them think I'm bullshitting. Oh well, their loss for passing on one for that reason.

What I want to know is if anyone has found that elusive 'sweet spot' in 6th gear where you get the best mileage. Air resistance becomes a major factor the faster you go, but at the same time you don't want to bog the engine down. I typically go about 75 on the highway, so overall with city driving I get about 20mpg or so, and that's with about 30% highway.

One thing I wish we had is that instant gas mileage meter that comes equipped on some GM vehicles (But I think we all know why GM didn't put one in).

Any thoughts?

Thanks

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Well lets see, I go to the gas station and as all the people there look at me like I am crazy for driving this Black on Black 2000 SLP/Z28/SS/LS1/Six Speed Camaro while I am filling up with 4.75 a gallon premium gas.
and even I have to remind my self that this awesome sounding car gets really good gas mileage, skip shifting in town and on the freeway. I drive all freeway to work. the problem starts when I get on the freeway and I see the same C5 Corvette everyday and we go through our getting in front of the rest of traffic game and then it is on! usually 130 to 150 till we hit the next bit of traffic.
Well there goes the mileage! but it is really fun to drive!

Chris

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Originally Posted by chrisout

Well lets see, I go to the gas station and as all the people there look at me like I am crazy for driving this Black on Black 2000 SLP/Z28/SS/LS1/Six Speed Camaro while I am filling up with 4.75 a gallon premium gas.
and even I have to remind my self that this awesome sounding car gets really good gas mileage, skip shifting in town and on the freeway. I drive all freeway to work. the problem starts when I get on the freeway and I see the same C5 Corvette evryday and we go through our getting in fron of the rest of traffic game and then it is on! usually 130 to 150 till we hit the next bit of traffic.
Well there goes the mileage! but it is really fun to drive!

Chris

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True that! Good mpg until ya get on it!:happy:

:seesaw:

yepp God Bless GM for making the LS1 and shapeing the fbody like a bullet lol 130000 and stil gettin 24 mpg doin 80 all day :nana::nana::nana::zoom::zoom:

I get higher mpg the closer to the speedlimit i get but theres no real fun in that is there?

how the fuck are you all getting good gas mileage..at full tank my car gives me 160 arrround town and higway...but on long trips i get bout 230 whit full tank...

I dont know ... i'm an A4 with 2:73's out back

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Originally Posted by 98ta_ra

how the fuck are you all getting good gas mileage..at full tank my car gives me 160 arrround town and higway...but on long trips i get bout 230 whit full tank...

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Have you ever changed your front O2 sensors? They can become skewed after 75k or so miles, sounds like you are running way rich. Is your car stock? Is your MAF stock? Are your rear gears stock? Is your car misfiring? Do you have aftermarket heads or camshaft?

I easily get 25 MPG (sometimes 27) highway when I had my '98 AT 2.73 TA, and the '00 6-spd 3.42 gives me 26-28.1 highway. Stock tunes, I have LT on the '00 which boosted highway MPG about 1.5. Both cars have aftermarket lids.

Highway range over 350 miles.

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Originally Posted by Too Fast

Have you ever changed your front O2 sensors? They can become skewed after 75k or so miles, sounds like you are running way rich. Is your car stock? Is your MAF stock? Are your rear gears stock? Is your car misfiring? Do you have aftermarket heads or camshaft?

I easily get 25 MPG (sometimes 27) highway when I had my '98 AT 2.73 TA, and the '00 6-spd 3.42 gives me 26-28.1 highway. Stock tunes, I have LT on the '00 which boosted highway MPG about 1.5. Both cars have aftermarket lids.

Highway range over 350 miles.

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well i just put 90 thou. miles in my car 2 days ago, my mods are headers, exhaust, transgo shift kit,volant intake, port/polised tb and maf and tune . and as for my o2's they have never been changed, i aint running rich thoug, my maf is stock, still got 273 in rear.. but ive noticed that when am over 50 mph and i let go of the gas i hear lil bubbly popping sounds(not loud) , as if i have an an air leak. but i dont have air leaks so it aint that.

I get pretty good mileage with cruise control enabled, but it's hard to do that during the day time.