Gas mileage

[waddsn1060]

Ok, I took my car in a couple weeks ago to gete some warranty repairs done and I was getting about 390 miles out of a tank. Now im getting barely 200. What could be wrong?
The plugs were among the items replaced and the throttle body was cleaned.

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91 BLACK MTX

DYNOED ON DYNOJET: 199.6HP, 187.1LB/FT
CENTERFORCE CLUTCH,GRIZZLY PAW THROWOUT BEARING,EIBACH SPRINGS,TOKICO STRUTS,BORLA CATBACK (35HP MY ASS!), SHO SHOP HI FLOW Y-PIPE, SUPERCHIP,73MM MAF, BOXLESS, SVO ROD SHIFTER, FRONT AND REAR STRUT TOWER BRACES,PP MOTOR MOUNTS, CRAP TINTS, PIAA 1500XT "FOGS" Hehe, POPO GRILL,
SONY XPLOD CDX M-620 RECEIVER
Dunlop SP 5000 Asymetrical 225/55/WR16
PLATES: SHO GN 91
AIM:waddsn1060
SHOCAGO MEMBER

 

[SHODWN]

thermostat

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Kirk J Doucette
Stormtrooper
97 White V8
M&M Flow Induction Hood
MAC Kwik Cool
Flowmasters
By-Pass Pipe
No Resonator
TCI-823800 Trans Cooler
Carbotechs Front and Rear
26mm Swaybar
2nd Generation K&N Cone Filter
Full 3" Cold Air induction installed below front bumper
Firestone SZ50 EP's 235/45/17 /\ 245/45/17 BF Goodrich's Waiting
SVT 17" wheels
Black outs
SHODWN Vanity Plate : I am the push that makes you move!

 

[ThatSHOkid]

how were u getting that many miles on a tank? do you do a lot of highway driving? i get liek 250 before my low fuel light comes on

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1993 White/Tan SHO MTX 96k Miles
[*] Eagle Super White Headlights ** American Products Company Super White Reverse Lights ** Hibrid Double Watt Super White License Plate Lights ** Colgan Custom Bra From Cincy SHO ** Gen. 2 Font "SHO" Windshield Banner ** Superchip Performance Chip ** Blacked Out "SHO" Lettering ** Sho Shop Y Pipe ** Coneless & Boxless ** K&N Filtercharger ** Blazertech Super Clear 55w Foglights ** Ventshade Sunroof Wind Deflector & Vent Guards ** GTS Headlight Blackouts ** Sony 10 Disc Changer ** All Possible Options
[*] Coming Soon: Tinted Windows, Nook Sub Frame Connectors & Sway Bars, Front Strut Tower Braces, & A Sig Pic!
[*] The Driver: Jay/Jason/Hubes
[*] The Car: Zsa Zsa
[*] The AIM Screename: KingPin641 (I am a NESHOC member)

***"Drive it like you stole it!"***

 

[ACV1081]

Dude I think they replaced your 4 cylinder with the SHO engine when they did your repairs... 390 miles per tank. DAMN! Let us know what you find out... kinda a 180 you think the repairs would have helped your gas mileage.

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~Adam Varney~ mailto:[email protected][email protected]</A>
1993 RED ATX(3 replacements) W/shiftkit, 17" Konig Reigns, 245/45/17 Goodyear F1 Gs, 26mm ASB w/poly bushings, Tweaked stock airbox with K&N panel filter, & D4U1 computer, blazertech fogs. GTECH time 0-60 in 7.02 1/4 15.58 @ 91.
Not yet installed: 24mm ASB, 70mm MAF(Gonna try it but from what I hear it will be a waste of time), all 60K service items, & rest of the poly bushings.. GOING TO TEXAS SOON HOPEFULLY TOHAVE SDPATT & JEREMY HOHN DO 60K!

 

[WaterRooster]

I get about 370-400....City and highway driving

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Shawn
93 Emerald Green MTX
PP Y-pipe, Dynomax Catback, 80mm MAF, LPM, Ebachs and Tokis,CAI

 

[AutoXSHO]

Yikes, a mileage thread.

Keep in mind some of you will have the 16 gallon tank, some will have the 18.6 gallon tank.

The later model SHOs (94-95 usually) have a recalibrated sending unit which will read empty with as much as 5 gallons of gas left.

Better to compare mileage. Driving hard (what other way is there?) I get about 17 in the city. On the freeway going 75-80 I get nearly 30 routinely, and have seen over 30 when going a more legal speed (65-70).

This translates into ~220 miles in the city before I hit the low fuel light. On the freeway I can go almost 400 before the light comes on, and if I'm feeling bold I can push it to 500 miles on a tank, with some to spare.

John V
95 MTX

 

[SilverSHO]

I have the 18.6 gallon tank, and I get maybe 200-220 miles to a tank, and that's when I take it easy (no hard acceleration). Still haven't figured out why, either. It's been that way since I got the car.

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Nick
Lt. Titanium 90 135k
Coneless, ACCEL 8.8 stainless steel wires,
SHO Shop torque limiters, Cherry Bomb Turbo II mufflers
AIM: loudog6491

 

[munkee]

I have a 90 3.0 mtx and I get about 20 mpg highway. Well cruising at 65 anyway. I was getting 32 mpg cruising 80-85 in my 88 GL. I didn't think you could get that kind of mileage in a sho though. I suppose the automatics would get better mileage. Could you guys post what engine size\transmission you have if its not already in your signature? Thanks.

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"It's not just the speed, it's how well you handle it."

 

[AutoXSHO]

The manuals will get better mileage, which is pretty much universally true. Primarily this is due to better gearing.

A SHO not getting at least 25MPG on the freeway has problems, most likely with the O2 sensors.

John V

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95 MTX with mods.

 

[SHOSKI90]

I am a new SHO owner, I am getting about 28 on the highway and 23 in the city, and I DONT drive easy. Mine is a 90 5 Speed. 91,000 miles and the A/C is never off. The only work that I am aware of that has been done to mine is a reworked exhaust system that I had done right after I got it, due to clogged cats. I had the valve covers off this past weekend to replace the spark plug seals. The engine was extremely clean inside. I am so happy with every aspect of this car so far. Now I get to shop for tires for it.

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1990 SHO, 5 Speed, New SHO Owner

 

[SHOtime93]

Stupid question- how do I know which gas tank I have, the 18.6 or the 16 gallon?

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1993 White SHO ATX
K&N Air Filter
1/4 mile 15.5 @ 92.4 MPH
400watt PPI amp and a single Fosgate HX2 12"
Powered by YAMAHA

 

[Blue]

a pretty quick way to figure it out is to run your tank bone dry, then fill it up. if gas is 1.30 for premium, and it costs you xxxx dollars, drivide 1.30 by how much it costs you total and viola. this dosent count in how much was in the tank before you filled it up, which is why you have to get it down to less than a gallon to figure out which tank you have. unless its in your owners manual, in which case im stupid.

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Aint nothing but a G thang

94ShoATX,Bizzy,and Blue

Red,White,Blue

 

[SHO SPD]

I have been getting a good 300-320 per tank of gas...I have the 18.6 gallon tank...That is mostly city driving, and not easy driving by any means....

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1989 Titanium pearl
CAI
K&N cone filter
G-tech times
0-60....6.61 sec.
1/[email protected] MPH

 

[Tommy the Greek]

When I go to Montreal from NYC it is about 389 miles one way and it usually takes a full tank of fuel to get there averaging 72mph.

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'95 SHO ATX, 55W foglights, coneless, fishtank mod, white/mocha cloth interior, 45K, Mobil 1 10W-30, build date 12/13/94.
Below is a pic of her @ 28K miles (Nov. 6, 2000)off interstate 87, overlooking Lake George, NY.

www.roushind.com
AIM: kalamos73

 

[Jibberish18]

Wow! I get around 230 mpg on strictly city driving. and I have a 13 gallon tank. I'm guessing I'd pull around 330 strictly highway driving. so that equals around 18-19 mpg.

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1990 Sable 3.0
"My goal is to have the ultimate Sable in road handling performance"

 

[AutoXSHO]

On the underside of the tank, there is a marking. It's either an "AA" or a "BA". You can see these marks with the car on the ground. If you have an "AA" it's a 16 gallon tank, which is a factory screw-up or a TSB for fuel sloshing with the big tank. The BA is a 18.6 gallon tank and is what ALL SHOs should have.

John V

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95 MTX with mods.

 

[TwiceSHOwn]

Can you take a picture of that marking in reference to where it is on the car please. I would like to check.

I get 300 to a tank of city driving minimium (meaning even if i am on the gas alot) and that works out to about 22 MPG on the highway i get 30-31 like clockwork.

My 91+ used to get 32 on the highway and 25 in the city.

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93 Silver ATX 57K
LPM
80MM MAF
Y Pipe
Eibach + Tokikos
Front and Rear STBs
Cold air snorkel
TCE SHO stopper brakes
Recovering from its 60K...sigh

 

[AutoXSHO]

Just look under the car. The gas tank is *right there* and all you have to do is poke your head under the car and look.

JV

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95 MTX with mods.