The annual gas mileage thread

[pjslover]

Mod List

1st Base "Sewer Pipe" Mod
Home Base Delete
2.5" Cat Back Exhaust
"X" Pipe
Xmission Shift Kit
Bilsteins
Drilled and Slotted Rotors (All 4)
Sequential Tail Lights

277,000 Miles (All Mine)

Still averaging 17.5 MPG !!!

AND STILL RUNNING STRONG.

NO Engine Repairs and NO Oil Usage - Unbelievable

I do use PROLONG, Maybe the Stuff Really Works.

[jcarenza10]

94' L99

130K Miles

RAISS
Air Charger
Cherrybombs
March Underdrive Pulley
MSD Ignition Coil and 8.5" Wires

275/60/15 Rear 255/60/15 Front
2.73 Rear End
Bilsteins
9c1 Springs
9c1 Swaybars Bars & Springs
9c1 External Coolers
HD Brake Package
AC Delete
Smog Pump Delete

Averages about 17 on the highway, 14-15 around town.

-Infamous LT-

[Meberhart]

Whats gas mileage? Everytime i hit the gas i watch the gauge go down... real fast.

[Gregg-O]

96 SS
No mods to speak of
255/50 stock wheels
3.08 gear

I get right about 15mpg around town, never see more than 10-15 hiway miles at a time. I drive it with 'spirit' lol. It's see's 4500-5000 rpms at least once just about every time I drive it, just to make sure things stay clean...I know, old school thinking, but it's fun anyway's. A/C is running 90% of the time. 120+k mile's, don't think it's ever had a tune-up, I haven't done one in the 5+ years I've owned it. I run Chevron as the car seem's to run better on it. Hell, I haven't even changed the fuel filter in almost 30K miles.

[more cubes]

I just got 20 mpg on a 255 mile freeway trip with my 4.10's. Did better than I expected with average speed around 65. Has a 92 octane tune, 160 t-stat, home depot intake mod and hockey puck. Everything is in good working order and I have synthetic fluids front to back. I also have 235/75 tires at 28.9" to help a little with gearing. Oh, and just for comparison- I only get 12 mpg with 100% city driving with very short trips.

[88LT1Wagon]

I'm still getting 15ish, very disappointed, the only thing that really changed when going from the '95 to the '88 was the tune, so that's got to be it. I was really expecting to continue to get 20 mpg on my commute, if I'd known it would drop to 15 I don't think I'd have bothered with the swap.

[LeadSSled]

1996
130,000 miles (6,500 on motor)
385 stroker with LE3 cam and LE-ported Trick Flow heads
4.10 gear
275/40-17 Falken Azenis on 17"x9.5" Forgeline RS
Infrequent driving
8-11 MPG just running around town, depending on agressiveness
14 MPG highway @ 70 MPH
100+ SMG (Smiles per Gallon)

[Bri]

I am seeing 12.2 MPG consistently. I'm in VegaSS and currently driving half of the time on the 215 beltway (highway driving) and half city. When I was driving all city about 9 MPG fairly consistently. I have been trying to baby the car for a LONG time now because of this but it seems to run that way regardless of being easy on it or "racing" it. See mod list in signature. I run 91 and 87 octane fuel from well, mostly ARCO (BP) and Rebel. I have no idea what could be causing this. No CEL's thrown. Within a year I've replaced fuel pump, fuel filter, PCV and made a flex adapter hose for it (as it melted through and caused a CEL) keep air filter clean and changed the front O2 sensors (as she has no cats or downstream O2's) for maintenance and possible MPG troubleshooting.
Any thoughts feel free to post here of PM me.

[jcarenza10]

Originally Posted by Bri

I am seeing 12.2 MPG consistently. I'm in VegaSS and currently driving half of the time on the 215 beltway (highway driving) and half city. When I was driving all city about 9 MPG fairly consistently. I have been trying to baby the car for a LONG time now because of this but it seems to run that way regardless of being easy on it or "racing" it. See mod list in signature. I run 91 and 87 octane fuel from well, mostly ARCO (BP) and Rebel. I have no idea what could be causing this. No CEL's thrown. Within a year I've replaced fuel pump, fuel filter, PCV and made a flex adapter hose for it (as it melted through and caused a CEL) keep air filter clean and changed the front O2 sensors (as she has no cats or downstream O2's) for maintenance and possible MPG troubleshooting.
Any thoughts feel free to post here of PM me.

Coolant temp sensor?

-Infamous LT-

[jay_dubb2k5]

95
9C1
No mods to speak of
255/50 SS wheels
3.08 gear
CAI
175,406 Miles
Nasty exhaust leak because both back driver side manifold bolts are broken.
Drove 879 miles from VA Beach VA to Meridian MS. Got 23MPG. I was in shock when I filled up in SC. Averagd 76MPH