I took a trip this weekend and recorded the mileage on the way home. I filled up before I left, then drove 152.8 miles home on 55mph roads. I kept the cruise set at 60 all the way. There were a few stop lights and small towns to drive through, but not many. Filled up when I got home and it took 3.893 gallons. 152.8 divided by 3.893 gallons = 39.2499 MPG! I believe I could break 40 someday

It is windy today, must have been heading west.

This was last night, between 8:30 and 11:00pm. It didn't seem windy? I filled the tank using the same method as I always do.

I believe you. I got 35.7 MPG in the Bonneville driving from Rochester, NY to Lancaster, Ohio at about 75 MPH loaded down with crap.

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Sweet! I wish I could break 25, lol. Where did you go?

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Bye Bye:

RIP sandrock

I'd believe it. I got 39 mpg going from Florence, SC to Williamsport, PA on ~15 gallons of fuel over 604 miles. I also got 39 mpg going from Columbia, SC to Hilton Head, SC twice. I've come very close to breaking 40 mpg a number of times. It's a great summertime pursuit.

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2012 Chevrolet Cruze Eco - Current car

1999 Buick LeSabre Custom - Former car

Learn from the mistakes of others, that way when you mess up you can do so in new and interesting ways.

If you can get 40 mpg and I can get 30 mpg running as rich as I am at 70 mph, then why can't those little 2.L 4 bangers get 80 mpg??

...because they have to floor it to hold 70 mph?


Oh wait.....maybe they can!

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2000 SSEi - SilverBullet - 78,000 kms, 4" "straight shot" custom headlight ram air inlet, TOGs, 1.9's, Lsd, 2.9-3.4"MPS 10-15 psi, Ported GenV, EGR eliminated, OR pushrods, oil volume kit, trani cooler & shift kit, Titanium retainers, 90 lb springs, 160 Stat, 42# injectors, Fuel pump voltage increase, Wideband O2, 3" to dual 2 1/2" Magnaflows, Snow Meth/water injection, after SC temp gauge, 255/50WR17, timing commander set 15-18*@WOT, 2 speed Fan over-ride, disabled DRL, Solid motor mount, Meziere Electric water pump, adjustable fuel pressure regulator, Drilled & slotted rotors/ceramics, GXP sway bars and STB, Upgraded and rebuilt transmission with ZZP 2500 rpm stall TC, Pioneer Bluetooth stereo with sub and 800 W amps, PB 13.5 quarter, (April 2014 car of the month)

I've averaged 45mpg+ over 150 miles... but it was all downhill, coming out of Yellowstone National Park

Huh...I hope my next Bonneville gets that kind of mileage. The SSE wouldn't do that for me. Even with all new parts and perfect fuel trims, 75 mph trips still averaged 25 mpg.

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John
Now: '15 Toyota Prius III | 134 hp 2ZR-FXE | Silver | 36k
Now: '03 Honda CR-V AWD | Slow 4-Cylinder | Dirt | 180k
Then: '07 Ford Fusion SEL | 221hp Gen I VVT Duratec 3.0 V6 | Tungsten Silver | 150k
Then: '99 Toyota Avalon XL | 200hp 1MZ-FE 3.0 V6 | Diamond White | 189k | Sold: July 2015
Then: '11 Ford Fusion SEL | 240hp Gen II VVT Duratec 3.0 V6 | Ingot Silver | 84k | Totaled: Oct 23 '14 (Rear-Ended)
Then: '96 Buick Park Avenue Ultra | 240hp Series II L67 | Medium Dark Lichen | Bought: JAN 11 @ 135k | Accident: FEB 3 '12 | Crushed: MAR 1 '13 @ 153K
Then: '98 Pontiac Bonneville SSE | 205hp Series II 3800 L36 | Topaz Firemist | Bought: NOV '09 @ 74k | Accident: MAY 28 '10 | Crushed: MAR 15 '11 @ 84k
Then: '93 Pontiac Bonneville SE | 170hp Series I 3800 L27 | Dark Yellow Green | Bought: JULY '07 @ 92k | Sold: JULY '12 @ 118k
Then: '89 Pontiac Bonneville LE | 165hp 3800 LN3 | Medium Garnet Red | Bought: JAN '05 @ 117k | Sold: SEP 30 '07 @ 152k

I get 32mpg at 70-75mph over the siskiyou summit from OR to CA. And that's in the Zilla. 40mpg? I bet I could if I kept it at 60. I'm a believer.

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Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers

Smellbird and I both hit 40 on the way to a meet in 2004? It was in Michigan mostly, and it was both a 98 SLE and 93 SE.



Stop driving like you're 18!

Wait...

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Jason Z - Exposed Autos

2001 BMW 330i - Titanium Silver - Sport Package - 3 Pedals - Koni Yellow/H&R Sport
2006 Volkswagen GTI - (gone) Tornado Red - DSG, Stage II~280hp/325tq
1993 Pontiac Bonneville - (gone) Purple Pearl H4U/SLE. Loud

Jason, sadly, if I drive like I'm 81 it doesn't matter, lol.

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Bye Bye:

RIP sandrock

Wow. The most I've ever gotten was 30mpg recorded, but I average between 27 and 29 mpg usually. I guess the altitude definately plays a role...and whether or not cops in your area will pull you over for going 60 in a 55 lol.

The very best i've ever gone with the Bullet is pussyfooting with mostly downhill grades over a 10 mile stretch at 50 mph.....39 mpg....but that was an unrealistic average. As soon as I had to accelerate a tiny bit it began to count down 1 mpg per sec.

Performance driving average is 13 mpg.

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2000 SSEi - SilverBullet - 78,000 kms, 4" "straight shot" custom headlight ram air inlet, TOGs, 1.9's, Lsd, 2.9-3.4"MPS 10-15 psi, Ported GenV, EGR eliminated, OR pushrods, oil volume kit, trani cooler & shift kit, Titanium retainers, 90 lb springs, 160 Stat, 42# injectors, Fuel pump voltage increase, Wideband O2, 3" to dual 2 1/2" Magnaflows, Snow Meth/water injection, after SC temp gauge, 255/50WR17, timing commander set 15-18*@WOT, 2 speed Fan over-ride, disabled DRL, Solid motor mount, Meziere Electric water pump, adjustable fuel pressure regulator, Drilled & slotted rotors/ceramics, GXP sway bars and STB, Upgraded and rebuilt transmission with ZZP 2500 rpm stall TC, Pioneer Bluetooth stereo with sub and 800 W amps, PB 13.5 quarter, (April 2014 car of the month)

I remember that -in fact I was just telling someone about that a couple days ago. That was awesome I remember. I know we'd filled up, got on a freeway in Michigan and set the cruise somewhere between 60-65 and filled up like 150 miles later so we could make it the rest of the way to Jim W's without filling.

IIRC, you'd gotten 40.5 mpg in your 93 SLE and Seth got 41.8 in his 98 SLE.

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DHP Powrtuner & Tech 2
1998 GTP Coupe
1999 SSEi 70k miles
2000 Silverado 2500 Ext Cab 4x4/6.0L/4L80E
2000 Trans Am WS6 LQ3 (LQ4 w/LS3 top end) 4L60E
2001 SLE
2002 Monte Carlo SS Top-swapped FSIC Gen V TOG's, Mezeire.....
2002 GTP 40th Anniv Ed Coupe
2004 GTP Comp G 'Bottom-swapped'

We did it near the border later, because we didn't want to fill up in Cannuckistan unless we absolutely had to

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Jason Z - Exposed Autos

2001 BMW 330i - Titanium Silver - Sport Package - 3 Pedals - Koni Yellow/H&R Sport
2006 Volkswagen GTI - (gone) Tornado Red - DSG, Stage II~280hp/325tq
1993 Pontiac Bonneville - (gone) Purple Pearl H4U/SLE. Loud

I got 36 mpg yesterday from Buffalo, NY to Dover, DE. Made it on ~15.5 gallons. Going back will be worse, since I have to climb from sea level to ~2000 feet in central PA.

_________________
2012 Chevrolet Cruze Eco - Current car

1999 Buick LeSabre Custom - Former car

Learn from the mistakes of others, that way when you mess up you can do so in new and interesting ways.

I went to New Ulm. My Father needed help re-shingling his house. I thought about trying to meet with you 00Beast, but the weekend was all work and no play for me

I should note that this was the first time I checked my mileage after having a 4 wheel alignment. Before the alignment, my best was 32 mpg...which I thought was not too bad. I'm glad I got it aligned...and so are my tires

Ahh. That's basically how the weekend was for me too, lol.

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Bye Bye:

RIP sandrock