Gas Mileage

[GTn00b]

Is there something wrong with my car its got 47500 miles on it and I get 17 mpg on the highway, do these cars need tune ups?

 

[40th GT]

I can see 17 mpg in city driving but 17 on the highway?? Start out by doing a tune-up. Meaning change spark plugs, clean K&N, clean T/B, synthetic motor oil might help, and change the fuel filter. And you're using the overdrive gear correct?

 

[GTn00b]

I can see 17 mpg in city driving but 17 on the highway?? Start out by doing a tune-up. Meaning change spark plugs, clean K&N, clean T/B, synthetic motor oil might help, and change the fuel filter. And you're using the overdrive gear correct?

How much would all this cost?

 

[tomustang]

damn i get about that, heh

 

[04DarkShadowGT]

Your trans type hurts ya alittle but thats seems way too low. I can get 24-26 on highway only. About 22-24 average mixed.

 

[Ruckus46Gt]

remember not sure where you are from but winter gas is out now and you will get worse mileage. Me not getting on the car now is getting the same mileage as me romping the hell out of my car all fall and summer. You will also notice a longer start with 93 and winter gas

 

[yamie700]

Hes right about the winter gas. My mileage went way down in the past few weeks. Driving just the same as always. Just highway with no damn traffic I can get about 22-24mpg now.

 

[Joe Friday]

Is there something wrong with my car its got 47500 miles on it and I get 17 mpg on the highway, do these cars need tune ups?

Perhapse because you have 4.10's ? What kind of gas mileage were you getting when you first swapped out to 4.10's?

 

[40th GT]

How much would all this cost?

Not much if you do it yourself. You will need a K&N recharger kit, tools to change plugs, fuel filter, oil and carb cleaner to clean your T/B. Doing this WILL make a difference if you haven't changed these parts in long time.

 

[Mike98GT]

If you think your getting bad gas milage now, wait till you do the 4.10's! Personally I wouldn't go that low on the gears. I have an auto too and get 22-23 on the highway. Do the Jerry mod before the gears

 

[joshheat25]

Whats the jerry mod and I too also would like to boost my mpg. How much is a fuel filter.

 

[CanadaStang]

Whats the jerry mod and I too also would like to boost my mpg. How much is a fuel filter.

Fuel filter is pretty cheap, you should get change back from a $20
Edit: Holy Crap josh, our 1/4 times are really friggen close

 

[baller760]

Well I drive 100 % city with a few WOT's along the way and get 15-16 mpg. However, when I do drive on the highway like to Palmdale raceway which is almost 2hrs away, I get like 18.9, but I'm also driving at 85-90 mph.

 

[In'till'zah]

All I get is 20 out of my GT, I used to get 25. But I've installed a Vortech on the car and that's why I have lost some MPG. And it's a constant 20 on the highway, with and without AC...

BTW: I have a 99 GT with an automatic.

 

[Dan_Soprano]

do these cars need tune ups?

ummmmm, yeah..........all cars need regular maintenance

 

[Big Steve]

When you do the tune-up don't forget to clean the MAF sensor. Oil from the K&N will accumulate on the sensor wires and screw up the readings. Go easy on the oil when you clean your filter, most guys put on way too much. Oh, and make sure the filter is real dry after washing. I like to dry it for a day or 2, keep a stock paper filter around to use during this time. Just a few hints I found to work over the 20 years or so I've been using K&N's.

 

[GTn00b]

so should I go ahead and put spark plugs and clean the maf, and tb?

 

[GTn00b]

ummmmm, yeah..........all cars need regular maintenance

The d1ckh3ad that I bought the car from said they dont have to be tuned up until 100,000, guess I shouldnt have listened

 

[2000GTnoExtras]

The d1ckh3ad that I bought the car from said they dont have to be tuned up until 100,000, guess I shouldnt have listened

I just tuned up my car again. I changed oil filter and topped off w/5w30 mobil 1 synthetic. Replaced fuel filter, spark plugs (NGK TR-55) remembered anti-sieze, and dialectic grease, PCV valve ($1.29), air filter.

Runs better, much smoother.

I recommend changing fuel filter every 15K, especially if you let your gas tank go to E between fill ups.

PCV is change insurance as I gotta get my car smogged last month.. oops.

If you run plantinum plugs, you can probably get 60K, but the copper plugs are cheap, and make the car idle and accelerate smoother.

Gonna get around to change tranny and diff fluid someday soon.