LS1 gas mileage

[madness410]

just curious to see what all you ls1 guys are averaging gas mileage wise highway and city. im in the market for an ls1 and have a 40 mile commute to work, just looking to see what i could expect. also if you could specify if the motor is stock or has mods, and m6 or a4. thanks

Jon

[V]

My '01 SS modded on highway was doing around 29mpg(4.5 hour drive) (cammed LS6)

The sixth gear helps a lot if on the highway, same deal with my old CTS-V.

[firebirdcrazy]

Stock LS1 6 speed with 3.42 gears all highway will do 30 MPG and thats proven by me with over 100,000 miles before I even added the turbo. With the turbo I dropped to 27 MPG on the highway 3.42 gears. With my new build 383 Stroker with turbo and 3.73 12 bolt I dropped to 23-24 mpg on the highway. Stock LS1 with city / highway you should average an easy 24-26 with normal driving.

[maroman88]

01 z28 A4 convertible (2:73 rear) with 130k miles got me 26mpg highway on a trip to vermont

[MyFirstZ]

I got 26 back in the day on the highway with long tubes and tuned.

[ThoR294]

My lt1 got close to 29 when it was stock. 6th gear idling ftw

[Jersyboyy]

Just drove from Louisiana here and I avg 25.5 mpg the whole trip.
180,000 mile 2000 a4 3:42 rear 3200 stall long tubes full exhaust lid no egr air or pcv.
Had a #2 misfire on and off from a bad plug AND I was cruising the first half the trip 70-80mph. Cruising the second half the trip 80-90mph with a few 100+mph pulls, still got 24.5.