What kind of mileage are you guys getting out of your 6 speed cars? Heres my car. 96 Formula 6 speed, OBD1 conversion. Stock motor, with Edelbrock 1 5/8ths, 3in catback, CAI, 3.73 gears, 160 t-stat. PCM was changed for fans to come on at 180. Im STRUGGLING to get 20mpg on the highway running about 70-80. Shouldnt I be getting better than that? Ive seen of a lot of ppl getting 25-27. Im not driving it hard. Its mostly very little in town, and 20-30min higway a day. What could be my problem?

Kyle

 

Running 70-80 will get worse gas mileage than 55-60. The faster you go, the more hp it takes to sustain that speed.

I get around 25 if I drive it good.

 

The new motor just clocked a staggering 10mpg city driving, sweeeeeeeeeet!

My old cam only combo would get mid 20s easy with 4.33 gears on the highway, havent done a road trip with the stroker yet, needs too much tuning.

 

18 mpg combined with 8 month old plugs. Back to 22 mpg with a fresh set.

 

Haven't checked HWY with the new motor but zi am getting 17Mpg city/some Hwy. I suspect I shou be around 23-25 hwy with my new motor. The last trip with my Hot Camed motor I got 25 MPG Hwy.

 

Actually, I get better gas milage going 80mph than I do going 60. I go to school up in MD, 6 hours away and I've tested different speeds to see what kind of milage Id get. Going 80mph, I only turn about 400rpms more than going 60, but every hour youve traveled 20 more miles. Going 60 I could never get more than 26mpg, but going 80mph I get 28mpg.

City driving, I shift 1-3-5 and I get about 18mpg.

These numbers are all with the mods in the sig, stock 3.42s and new plugs/wires about 6,000 miles ago.

 

i get roughly 27-30mpg on the highway doing ~85. i've also clunked it down into 5th and kept it at 65 and gotten similar. in the city, i get around 11. WOT i get about 2 gallons a mile.

pretty much all i have is blower/42#/fuel pump/3.23's

 

highway is great just under 30 mpg in 6th @ about 1750 rpms

local can be as low as 12 and high as 20 depending on my foot and shifting

 

When my 96 WS6 was still stock but with 4.10 gears, I got 28mpg at 75mph a couple of times. Combined was 20-22mpg all the time.

After the HOT cam went in, did 26mpg at 75mph a few times. Still 20-22mpg combined also.

 

Best I ever got was 31mpg, on a highway roadtrip. I average about 27-28ish normally on the highway. City driving i have no clue.

 

Well, I can't argue with experience. My other cars didn't do as well at higher speeds but maybe this low strung gear and m6 will like the 80mph speeds.

 

15-18 mpg

 

I get about 14mpg city/hwy

 

I have been ****, and kept track of my milage since I bought my car new. It now has about 68,000 miles and I have averaged 21.5 mpg over the life of the car. This is a mix of about 60% highway, 40% city with a few dyno runs and 1/4 mile blasts.

The high is 31.5 mpg, and the low is 16 mpg.

Dan

 

By the way, when I changed my headers, I was getting bad milage for a while until I changed out my front O2 sensors. Things were great again after that.

You might want to replace your O2 sensors if it's been a while (more than 50,000 miles or so), in my opinion.

Dan