Shackleford

iTrader: (12)

I was thoroughly disappointed. Should it jump back up? I gunned it just a handful of times the last tank. I do about half city/highway driving.

Horsepwraddict

iTrader: (12)

are their any post-seafoam numbers?

Sunset'01Z

iTrader: (10)

that's not that bad, though you should be getting 19-20. how did you calculate it?

Shackleford

iTrader: (12)

I'll have the post-seafoam numbers when I fill up next time, which should be in a week or so, hopefully.

I used the trip meter to determine how many miles I went before I filled up again.

Starion

iTrader: (5)

17.8 is about right. I have the same setup, even the same year. I'd be surprised if mileage increases significantly from the seafoam. I've used it and it did jack squat for increasing mileage. It's a good cleaner though.

crazymofo1986

iTrader: (3)

if they droped that bad change out the plugs you could have fouled them

Shackleford

iTrader: (12)

Well, I just bought the car, so I don't know what it got before.

5301113

iTrader: (18)

That seafoam is magic in a can

JScamaro

iTrader: (6)

I am getting 20-22 mpg running rich after my header install. That would suck to get around 17 mpg.

Since you just bought the car I would change out the plugs and fuel filter. You never know when the previous owner did those things.

CK9887

I can get 300 mi to the tank mostly hwy.... I think the most ive gone was 330 mi... comes out to about 22 mpg....
So not bad, but its strange how some LS1s only get around 18-20mpg while others are getting near 30mpg

98_Formula

iTrader: (15)

ah, dont feel bad my car gets horrible gas mileage, i have the 2.73 gears and your doing better than me..

i think i pull 240 miles between fill ups, the headers i think are killing me.

WS6NIGHTMARE

iTrader: (7)

all these suggestions for tune a tune up. I guess you'll be back in my driveway before too long eh.

VIP1

I can't seem to get better than 15mpg.

Sunset'01Z

iTrader: (10)

wow now i dont feel so bad.. with 2.73's i was getting 21-23mpg avg and usually 300-320 miles per tank. now with 3.42's i'm getting 19mpg consistently, no matter how much hwy or city i do.

King Nothing

iTrader: (9)

i get alittle over 400 miles out of my tank 24-25mpg for me

Shackleford

iTrader: (12)

HAhaha. You got that right, J! Want to change the fuel filter for me? I'll provide more Taco Cabana!

WS6NIGHTMARE

iTrader: (7)

Get ya everything you want to do and weather permitting, we'll get down on it this weekend.

ChocoTaco369

Going from stock manifolds and 2.73's to headers, 3.42's and no tune helped my mileage I was getting 22 mpg, I usually get 21.5. I haven't driven my car in over 2 weeks, though. Going through withdraw That's with a city/highway mix.

TA adam

wow i have a 98 TA with cat back air intake and only get about 200 miles to the tank

it A4 though

black01_WS6

iTrader: (13)

the 98 tank is also a little smaller than the rest of the newer f-bodies. So you may actually be gettign better gas mileage and not know it.