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Want to get a LS1 but have a question about MPG

This is a discussion on Want to get a LS1 but have a question about MPG within the General Help forums, part of the LSx Technical Help Section category; I run 91 octane in mine. I get right at 24 mpg always on the highway....

  1. #81
    Junior Member Twistingreality's Avatar
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    I run 91 octane in mine. I get right at 24 mpg always on the highway.

  2. #82
    FAS02SS
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    2002 Camaro SS

    You'll Pay $$$

    My M6 SS get's great mileage even w/4.10's but the power is addicting and it's damned near impossible to stay out of it. I'm in 5th or 6th even in town but you must exhibit some serious self control if you want good mpg. Premium unleaded is pricey so be prepared to spend some $$$ on gas. It's worth every penny though!!

  3. #83
    Senior Member Too Fast's Avatar
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    Quote Originally Posted by Twistingreality View Post
    I run 91 octane in mine. I get right at 24 mpg always on the highway.
    Seems a bit low. I would get from 25.5-27.3 in my '98 AT with 2.73 rear gear. My '00 WS6 now gets between 26.5-28.5 since my headers, up about 1.5 MPG before the headers. That is highway only MPG, driving 5-10 over the limit with AC on as needed. I wonder what MPG would be if I could stand to drive 55-60 for 3 hours.

  4. #84
    with a LS1 2MuchFun's Avatar
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    2005 Cadillac CTS-V

    In 6th gear, 1600rpm, 70-80mph from indy to ohio (129 miles) i got 27.5mpg....

    I love that 6th more than anyone except ppl w/6speed can imagine........even if i put 3.73's in, i will still be atleast at 26mpg!!

    My buddy was driving beside me in his 97 a4 z28 w/3.73's, taching 2700rpm, he got 22.5 mpg, which still isnt bad......

    I get 18mpg if im always on it, 22-24mpg average just driving around, good thing im not in traffic much!!

  5. #85
    with a LS1 2MuchFun's Avatar
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    2005 Cadillac CTS-V

    we are both getting cbr 600's or gsxr600s asap

    so then we can maybe beat these gay gas prices!!

  6. #86
    SuperSport SSPORT's Avatar
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    Pewter Metallic
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    My 2000 Camaro SS gets around 16.5 mpg to 18 mpg in mixed highway and suburban (not city) stop and go, That's with a light foot on the pedal around town, and cruising speeds of around a steady 80 mph on the highway. Or to put it another and more practical way (as they do in Europe), my fuel consumption rate is on average 6 gallons of 93 octane gas per 100 miles. NOTE: I have a 6-speed, which is good for economy, but I also have 3.73-1 ring and pinion gears in the diff (Stock is 3.42-1), which inreases the revs by 500 RM in each gear, which is bad for economy (but good for performance).

    A few economy tips: use cruise control if you can on the highways -- driving from Chicago to Boston with cruise control last year, I got around 25 mpg on average for the highway.

    Also, keep your tires inflated to spec, or 2 to 3 psi over. Don't carry any excess weight in the car. Keep the car clean (dirt creates turbulence in the airflow, and increases drag). If you have a manual, shift to higher gears when you can.

    Just, remember: everything that makes an LS1-powered car really fun to drive is Hell on your fuel economy! ;-)
    (Was "Bolide," member since 5/2000). 2000 Camaro SS, M6. SLP Level 1 susp, SFCs + STB, cold air kit, 1.85-1 rockers, Race LCAs + Panhard, Richmond 3.73 gears, B&M Ripper, Shaner S2, MAF ends, Hypertech etc. 328 rwhp (stock tuning)

  7. #87
    with a LS1 2MuchFun's Avatar
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    dam 500 rpm in every gear?? i guess 6th is still low enough to handle it.....

  8. #88
    This Light Dinner Is Over hamburger68's Avatar
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    1998 Camaro Z28 A4

    yep, that's why i keep my 2.73 gears in the A4, with the crazy gas prices in germany....

  9. #89
    MSG Crusty SPECOPS94's Avatar
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    2002 Camaro SS LE

    93 Octane.. 16.5 per gal until I switched to Royal Purple, now 18.5...in town.

  10. #90
    Junior Member rawSS's Avatar
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    I have a 2001 M6 w/ K&N intake I get 28mpg @ 75mph (93 octane) on the hwy w/ cruise cntrl on

  11. #91
    Slow'er'Ass Mr. Luos's Avatar
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    Mileage....

    Bolt-on LS1 (M6---3.42 gear) got me 31 MPG on the highway and 24 around town. Of course...this was driving it lightly.
    Cam'd LS1 (M6---3.42 gear) got me 27.5 MPG on the highway and 22 around town. Again...light on the pedal.
    Stroker LSx (big cam, good heads, 402 cubes, M6---4.11 gear) got me 20 MPG on the highway and 16 around town. Shifting at 2,000 each gear. 75MPH has it spinning right at 2,000RPM's on the highway in 6th gear.
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

  12. #92
    Member edbird's Avatar
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    1999 trans am convert

    Did 140 mile trip this past weekend and got 28.4 highway.Best thing was.......... TOP WAS DOWN,YEAH!!!!LOL

  13. #93
    Senior Member Too Fast's Avatar
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    I'd have to say, for a well over 300 HP car, the LS1 F-bodies get fantastic MPG, especially the 6-speed cars. Now imagine that engine with variable valve timing and variable cylinder displacement (tho I have heard that the new Chrysler Hemi's with anything other than stock exhaust sound like crap when they run on V-4 mode).

  14. #94
    Member 99'CajunFirehawk157's Avatar
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    Did a lil 400 mile run yesterday, @ 75 mph with top up and down I avg around 24 mpg...My LS1 A4vert toy gets better mpg than my 06' nissan frontier crew cab v6 A4 daily driver...go figure, more fun too.

  15. #95
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    Quote Originally Posted by kawana View Post
    Arg i dont know what to do anymore lol, im getting mixed opinons. Some saying the millage isn't that bad, others saying its awful. I live in an area with fairly light traffic, i live about 2 miles from work. Lets say i drive like, 5-8 miles per day, any idea roughly how much it'd cost per week for gas? I really want this car but i want to be sure its something i can afford. What mods can be done to increase millage besides Intake? Would lightening the weight help? Id probably take out the back seat as for the next 2 years i can only have 1 passenger anyways. Would taking the rear seat out do enough to make it worth while? If you can think of any way to increase gas millage aside from the obvious (going easy on the right foot), it might help me decide if this is feezable for me.
    You know, it's not really that bad. Seems like you don't do much driving at all.

    Here's a rough estimate:

    Say you do ten miles a day, that's 70 miles a week. We'll say you drive conservatively, and get 20mpg.

    That's 3.5 gallons a week. I gassed up today, and noticed that 93 octane was 3.20.

    3.5 gallans @ 3.20 is $11.20.

    That's NOTHING!!

    Even if you double the mileage you travel, that's still not much more than 22 bucks a week.

    I'm actually looking into getting a SS for a DD too, and I have the same concerns as you. My situation is a bit different though. I drive 31 miles EACH way to/from work. Now THAT adds up! But ten miles a day? I wouldn't even worry about it. My 28 mpg daily driver just died, so I've been driving my 16mpg Jeep. I'll be spending about 60 bucks this week on fuel.

    As far as the second car, I can't fault your logic of having a winter beater. Howver, buying a 2nd car just for the mileage doesn't make much sense with the distance you drive.

    Do that 70miles a week with a 30mpg Honda, and you'll use 2.33 gallons.

    With the cost of 87 octane at 2.99, it'll cost you about $6.97 for the week.

    So, to save $4.23, you've had to look like a dork and live w/out 200 horses all week.

    Now 4.23 is a small price to pay to not look like a dork, isn't it?

    Seriously, these cars get amazing mileage for the power they have and the performance they're capable of. Alot of 4cyl import sedans struggle to get the same highway numbers as these cars do. You figure a 160hp Scion coupe israted at 28mpg on the highway, and that a 300hp 6-speed F-body can get or even EXCEED that same number with more than DOUBLE the engine, that's frickin' unbelievable.

  16. #96
    !!!!!!!!!!!!!!!!!!!!!!!!! ATCharming's Avatar
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    Quote Originally Posted by StuntmanMike View Post
    You know, it's not really that bad. Seems like you don't do much driving at all.

    Here's a rough estimate:

    Say you do ten miles a day, that's 70 miles a week. We'll say you drive conservatively, and get 20mpg.

    That's 3.5 gallons a week. I gassed up today, and noticed that 93 octane was 3.20.

    3.5 gallans @ 3.20 is $11.20.

    That's NOTHING!!

    Even if you double the mileage you travel, that's still not much more than 22 bucks a week.

    I'm actually looking into getting a SS for a DD too, and I have the same concerns as you. My situation is a bit different though. I drive 31 miles EACH way to/from work. Now THAT adds up! But ten miles a day? I wouldn't even worry about it. My 28 mpg daily driver just died, so I've been driving my 16mpg Jeep. I'll be spending about 60 bucks this week on fuel.

    As far as the second car, I can't fault your logic of having a winter beater. Howver, buying a 2nd car just for the mileage doesn't make much sense with the distance you drive.

    Do that 70miles a week with a 30mpg Honda, and you'll use 2.33 gallons.

    With the cost of 87 octane at 2.99, it'll cost you about $6.97 for the week.

    So, to save $4.23, you've had to look like a dork and live w/out 200 horses all week.

    Now 4.23 is a small price to pay to not look like a dork, isn't it?

    Seriously, these cars get amazing mileage for the power they have and the performance they're capable of. Alot of 4cyl import sedans struggle to get the same highway numbers as these cars do. You figure a 160hp Scion coupe israted at 28mpg on the highway, and that a 300hp 6-speed F-body can get or even EXCEED that same number with more than DOUBLE the engine, that's frickin' unbelievable.
    awesome man. i never looked at all the numbers

  17. #97
    Member SAGGIN's Avatar
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    02 SS, 03 BMW 745

    The LS1 averages 19mpg on street and 21 on highway depending on how you drive it of course.

  18. #98
    Speak the truth jad628's Avatar
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    My M6 gets around 18mpg everyday driving and can touch 30mpg on highway trips. A "mixed" trip to the beach of 200 miles (none on an Interstate) nets about 26.5-27 mpg. The great thing about an M6 LS1 is that it can pull sixth at any speed above 50mph. I have went up Black Mountain on I-40 in it and could accelerate from 55mph without downshifting. All free mods, P&P TB, and good maintenance. I run 93 octane only. Stock 3.42 gear.

    I'm curious about those who selectively use the AC. I have not noticed any significant difference using it or not.

  19. #99
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    I've tracked gas mileage on my '97 since the day I bought it. The overall average so far is 19 mpg. The last two years this consists mostly of a 2.5 mile run to a commuter bus parking lot twice a day. The car has barely time to warm up. I've gotten nearly 30 on I10 on long trips.

  20. #100
    !!!!!!!!!!!!!!!!!!!!!!!!! ATCharming's Avatar
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    its not an ls1... but i kept track of my last tank ( i have a 305 tbi ) and i averaged out at a whopping 28mpg. this was my first full tank with it, so i was playing around in it alot. lots of burnouts, donuts, wot runs to 100...
    i also raced my friends foxbody a couple times..

    yea, and averaged at 28! sorry guys, different engine, but i had to brag

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