Tune up = plugs / wires / filters / fluids / lubrication, you don't really need to add to a list when it starts with tune-up

 

x2 im with chibi to make sure your not going to over look some thing is to do what was mentioned by chibiblacksheep

 

seafoam treatment is never a bad idea

 

Yeah usually it will stay full for a bit, then once it gets down to half or a quarter it just disappears it seems.
On my trip this morning 20 miles .08 gallons used averaged ~25

Of course no one is on the highway at 5am so I just had it in cruise at about 65 the entire time.

 

That's totally normal for GM cars.

Thats not that bad for highway- definitely low, but not as bad as I'd initially thought.

 

Well I was really easy on the gas, if I start passing people or really push it on the ramps I can see it going down even faster.

So I'm looking at replacing some filters and checking into a tune up. Then I'll have to compare to see if I'm just trippin about the gas or if there really was/is a problem.

 

Time to start the mods

I'm up to 34mpg on the highway

 

Yeah just a simple tune up should help you out, plus you're mileage is being effected by the car running for about 5 minutes when you start it. I don't think your mileage is horrible. I'm getting 25mpg on the highway (at about 76mph or so) and 17mpg in town (hard HARD driving, lol ). It's on the low side but not horrible.

 

The dealership quoted me 150$ for plugs and 75$ for the fuel filter both prices including labor. Not ready to make an appointment yet.. but do these prices sound fair?

Well letting the car sit it's going to be 0mpg.. so that's going to bring down my average is what you're saying?
After this tank I'll do the math myself, either way if my mileage ain't bad, my car still deserves a tune up. :]

 

mine says that i get 3 mpg's on wot the whole time while im driving. is that good? people always honk at me. i fill up twice a day.

v6 = gas hog for sure, shoud of went with the fiero