This winter is killing my gas mileage.
I don't drive too much to begin with, and mostly in town 35mph stop and go.
But with all the warming up of the car due to the weather I'm getting 13.8-14.0 mpg

How about the rest of you?

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I get 16-17 in town
30 highway with cruise control

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2001 Bonneville SSEi. 1598xx mi.
great car. Wrecked


Burnt Bonny.

Note if you pull the injectors to obserbe fuel delivery...make sure you leave the plugs in and disconnect the ign. Believe me

She's got 60K and a fresh tune up (new plugs/ wires/ filters)
I reset the OBC.
I may have 300 miles on it since, so I still see it change as I drive or let it warm up. lol

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12.7 here, but mostly city driving. I got 22 on a 160ish mile drive last week though.

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-Ryan
2004 GTO....LS1, LSA supercharged 525whp, 6MT
96 SSEi...September 2010 COTM........GONE
04 GTP comp G.... December 2015 COTM........GONE
2013 Audi Allroad Quattro

I know mine is an L36, so it should be slightly higher than the L67, but in the cold around town I average about 16 roughly, maybe slightly more with a light foot, and about 13mpg with how I drive lol. Highway I average about 28 with a light foot, and about 24 with spirited driving. For the cold weather and mostly city driving, that sounds about right. My dad's PAU only gets right at 14 in town in the winter.

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Joseph

Current: 2013 Infiniti G37 Journey
1999 Infiniti G20T - Sold
1999 Buick Lesabre - Race Couch - gone but not forgotten

I pull right around 16-17 mpg on average in the winter. I have remote start and warm it up 8 minutes everyday before leaving work. The car is parked in a garage at night though. About 50/50 city and highway driving. With the stop and go traffic it may as well be considered mostly city driving.

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-Nick
'95 Grand Prix SE coupe 'Black Betty' gone but not forgotten- my 1st love
'99 Olds Alero GX Coupe the get me by beater- sold
'03 Bonneville SSEi 'Gina' Feb. '16 COTM | 35% tint | smoked tail lights | boat roller mount | carbon fiber accents | Silverline exhaust tips
Ziebart rust protection & undercoating | CompuStar Accustart | LED interior lighting
Intense shift kit | Intense FWI | 3" ZZP downpipe | RDI headers | 3.4 MPS | Autolite 104s | 180 deg t-stat | custom tune | ZZP high flow fuel filter | alum coolant elbows and LIM gaskets | much more to come…hopefully
'15 Buick Regal 2.0 Turbo AWD 259 HP | 10k miles | 2-way remote start | undercoating and window tint to come
'98 GMC Sierra SLE Z71 4x4 | 112k miles | S&B intake | garage ornament | more to come

If I don't idle a lot and miss the really bad Chicago traffic, I get 17-18.

If I idle a lot/it's cold as balls/traffic gets me, it dips right down to 14-15.

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles

I live about a block from work so if I don't go anywhere farther than that right now I'm in the 12-14 range. It has a little to do with my heavy right foot and a lot to do with idling to warm up and in drive thrus.

It still gets good mileage on the highway, but I seriously think my truck with a 5.3 may do better around town... I haven't really checked though, no DIC in the truck.

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DIC isn't really reliable, although it's also known to be optimistic.

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles

Also remember, up here in the great white north, there is a different blend for winter that isn't as efficient as a spring/summer/fall version.

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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck

That's right, I forgot about that.

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Yeah, the winter blend kills my already rich running engine.

I have a 26 mile commute to work, and I usually have to fill up every 6-7 days (depends on how much driving I do on the weekend). I don't know my individual town and highway mileage, but this time of the year, at each fuel up I average 18-19.

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- Greg | -- Project Prasinos -- |

1995 LeSabre Custom: 312K Miles | Custom K&N CAI | Edelbrock SDT Muffler | Camaro Tips | 180 T-stat | LED Interior
& Exterior | 20% Tint | PA Grill & Portholes | Limited Trim | GTP Rims | Ported LIM | Plus Many More Mods | Restoration Thread
2001 Bonneville SSEi: 225K Miles | Instense FWI | Intense MPS (3.4") | 180 T-stat | ZZP Plog | Ported Rear Manifold |
ZZP 3" Downpipe | Magnaflow Cat | Retrofitted HIDs | GenV M90 | GXP Brake Upgrade | 35% Tint | Plus Many More Mods |
2005 Bonneville GXP: 101K Miles | Custom FWI
2009 G8 GT: 89K Miles | 35% Tint | Roto-Fab CAI | SOLO Mach Exhaust | BMR Tunnel Brace | BMR Sub Frames | BMR STB |
Kooks Headers | QTP Electric Cutouts | BMR Sway Bars | Elite Engineering Catch Can | Innovative Dual Wideband Kit
1984 Caprice Classic Wagon: 86K Miles | Restoration Project

My car says my average between city, highway, and daily remote start that its about 15 to 16.5 mpgs. Which is pretty close because I get to about 200 miles and my gas gage is nearing the 1/4 full mark. It sucks filling up weekly, lol.

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2000 SSEi *sold 9/27/15* December '12 & May '15 COTM
2005 Grand Prix
2009 G8 GXP #418 of 1,829 November '15 TOCOTM

City and highway combined I'm averaging 16.2

I'm AVG 18.7 that's about 70% highway 25% city and 5% warming it up

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Never getting rid of my Bonnie