20.2 miles per gallon

"Dr. Zoidberg - RIP Oppo" (thetomselleck) 01/06/2018 at 23:12 • Filed to: At least I don't drive too often, Whatchamacallit

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Record high remains 22.3... One source of comfort is that most everyone on the IS forum struggles to break 20, which I’ve been under only once ever. But smiles per gallon: BIGLY.

Agrajag > Dr. Zoidberg - RIP Oppo 01/06/2018 at 23:16

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I once managed 26mpg in the LS430 on a long highway drive. Once. Don’t think I could drive that slowly again.

Around the rural roads I’m getting 16-19.

If only EssExTee could be so grossly incandescent > Dr. Zoidberg - RIP Oppo 01/06/2018 at 23:18

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That is... not as good as a car that size should get.

Dr. Zoidberg - RIP Oppo > If only EssExTee could be so grossly incandescent 01/06/2018 at 23:21

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Thirsty 2JZ boi

If only EssExTee could be so grossly incandescent > Dr. Zoidberg - RIP Oppo 01/06/2018 at 23:23

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My car is a foot longer and a good 400lbs heavier and manages 20/32 city/highway with the same type of engine. Surely such a yuuuuge economy difference can’t be attributed to the engine alone?

Dr. Zoidberg - RIP Oppo > If only EssExTee could be so grossly incandescent 01/06/2018 at 23:28

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Wrong. It’s pretty much EXACTLY because of the 2JZ-GE mated to a torque-geared 5 speed slushbox. 70 mph is at 3300rpm or so.

wafflesnfalafel > Dr. Zoidberg - RIP Oppo 01/06/2018 at 23:36

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That’s really pretty good. I usually only got 23-24 mixed in the 2.3 MZR Mazda 3. Our Civic before that was a gutless wonder and still only got 26-27 mixed. Don’t even ask about the WRX... basically it will drink as much gas as you want to give it. The only car I’ve ever owned that routinely got over 30 in normal mixed driving was an 86 Civic hatch and it had a whopping 12 hp and only weighed about 175 lbs. I’m convinced that 98.4% of folks that claim amazing mpg figures are BSing.

Eric @ opposite-lock.com > Dr. Zoidberg - RIP Oppo 01/06/2018 at 23:45

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That’s painful. Even with really short drives where my FoST never warms up it usually gets better than this (and it has more hp/torque). Then again, my wife’s Mazda3 only gets 21-24 mpg, even with longer-distance commuting (and your IS300 has about as much more hp/torque than her car as mine has more than yours).

How does this car get such poor mileage?

Gerry197 > Dr. Zoidberg - RIP Oppo 01/06/2018 at 23:50

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My E46 sedan, 328I manual, rarely gets more than 21.5 mpg on my commute, assuming I don’t drive it too hard.

It just surprises me how much technology has come along these days. My new F150 2.7L gets me over 22 mpg on the same commute, while being faster from 0-60 by almost a full second (5.8 sec vs 6.7 sec).

Then again, an aluminum-bodied 2.7L DOHC twin turbo, direct & port injected, with 325 hp / 400 ft-lbs torque and 10-speed auto is not something you would have associated with a fullsize truck back then, or even today.

Dr. Zoidberg - RIP Oppo > Eric @ opposite-lock.com 01/06/2018 at 23:53

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Well, it’s a car that was designed in 1998, and it’s an inline 6.

Eric @ opposite-lock.com > Dr. Zoidberg - RIP Oppo 01/06/2018 at 23:56

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I have a car with a V8 that gets similar fuel economy. Possibly better. Beyond this, that car makes more power than yours (almost the same as my FoST, but slightly heavier).

Dr. Zoidberg - RIP Oppo > wafflesnfalafel 01/07/2018 at 00:01

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My 96 DX got 36-40 MPGs, dropping to 32 in winter. I never realized I would never sniff those numbers again in any car.

Dr. Zoidberg - RIP Oppo > Eric @ opposite-lock.com 01/07/2018 at 00:03

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An IS-F gets better mpgs than mine, so I believe it.

Eric @ opposite-lock.com > wafflesnfalafel 01/07/2018 at 00:03

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People don’t believe me in my groups, either. I’m notorious for my really excellent fuel economy even when I’m driving with them at the same speeds...

Here’s what my fuel economy has looked like recently (Driving in heavy traffic and really short runs. Aug 12 was after a rally to Leavenworth with others in similar cars to mine, and one of the other higher ones was after the Seattle Oppo cruise.):

Here’s what it looked like when I lived in a rural area with minimal traffic most of the time, in spite of my car really never warming up during my commute:

Most people claim they can barely get 22mpg on their commutes...

I also just noticed that I’ve been driving so little that my car hasn’t been filled since late November. Crazy.

Eric @ opposite-lock.com > Dr. Zoidberg - RIP Oppo 01/07/2018 at 00:10

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But my V8 car is older than your IS. Built in 1999 and sold in January of 2000.

Dr. Zoidberg - RIP Oppo > Eric @ opposite-lock.com 01/07/2018 at 00:12

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To be fair to those non-believers, even on Oppo we had many many many posts about awful MPGs for FoST owners.

Shift24 > Dr. Zoidberg - RIP Oppo 01/07/2018 at 00:14

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Ouch, man that’s high for an overdrive gear. Pretty sure EssExTee like me has an e39 but I’m up 2 cylinders and see the promise land of 22 mpg regularly in an auto zf 5 speed.

Could it be winter blend right now? Though not sure that’s a thing in Washington. Do you think if you took more country/4 lane highway (45-55mph) you could hit that 25 mpg?

Dr. Zoidberg - RIP Oppo > Eric @ opposite-lock.com 01/07/2018 at 00:19

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[Shrugs] I drive a few thousand miles a year so it’s okay

AestheticsInMotion > Dr. Zoidberg - RIP Oppo 01/07/2018 at 00:19

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Big tank tho

AestheticsInMotion > Eric @ opposite-lock.com 01/07/2018 at 00:21

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Believe it or not, the Miata is in the teens. Lighter than both of yours, less power, and with modifications that make it slightly more aerodynamic than stock.

Dr. Zoidberg - RIP Oppo > Shift24 01/07/2018 at 00:33

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I once drove 95% highway miles... Still got 21.

Bman76 (hates WS6 hoods, is on his phone and has 4 burners now) > Dr. Zoidberg - RIP Oppo 01/07/2018 at 00:51

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The TA gets 21mpg 90% of the time, I’ve gotten as high as 28 highway with an empty car and a tailwind :D

Eric @ opposite-lock.com > Dr. Zoidberg - RIP Oppo 01/07/2018 at 00:52

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I do believe them on that, but it’s clearly possible to get decent fuel economy out of one. I don’t think anyone could have thought I was terribly conservative on the cruise when in the twisties...

e36Jeff now drives a ZHP > Dr. Zoidberg - RIP Oppo 01/07/2018 at 01:03

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Is this mostly city driving? My ZHP does ~25 average with mostly highway, but alot of cold engine city now that I have to take my daughter to daycare. In pure highway I regularly do 27-28 and my best tank is 30. City driving is around 22 most of the time.

PG; the scalpel wielder > Dr. Zoidberg - RIP Oppo 01/07/2018 at 01:15

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I think being an auto you’re always going to struggle getting great mileage. Our 2.0 Mazda3 stick gets average 31 mpg mixed and my 135i gets 23-25 mixed (albeit its moderately tuned to be about 400hp at the wheels). Perhaps I just don’t drive hard enough

PG; the scalpel wielder > Eric @ opposite-lock.com 01/07/2018 at 01:17

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Salute to you my fellow data collection nerd. I use the Fuelio app for android. Just don’t venture into the total cost spent too often, it’s just a world of hurt haha

Shift24 > Dr. Zoidberg - RIP Oppo 01/07/2018 at 01:26

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Damn... Thought that would be the ticket

Dr. Zoidberg - RIP Oppo > PG; the scalpel wielder 01/07/2018 at 02:10

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Well I do admit that I am more spirited in this cars than with others...

Dr. Zoidberg - RIP Oppo > e36Jeff now drives a ZHP 01/07/2018 at 02:13

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It doesn’t matter the conditions. Hot, cold, city, highway: always 20-22

If only EssExTee could be so grossly incandescent > Dr. Zoidberg - RIP Oppo 01/07/2018 at 06:18

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Oh, I thought yours was a manual. That explains it. Like you, I have a close range box with no overdrive. 70mph is somewhere around 2800rpm. I can only hit 30mpg if I’m going 50-6o on the highway which nobody here does. My real world highway econ ends up being 28ish.

e36Jeff now drives a ZHP > Dr. Zoidberg - RIP Oppo 01/07/2018 at 08:25

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That seems absurdly low for what it is. Did they design it with a 7th injector that just sprays gas directly on the pavement?

Eric @ opposite-lock.com > AestheticsInMotion 01/07/2018 at 09:16

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That is definitely surprising. It looks like something that should do 25-30 even if you drive it aggressively.

Then again, that means 22.5-27 on E10. We’re all suffering losses in fuel economy in older cars due to that change. It has long made me wonder what would happen on E0, but it isn’t available in enough places to test it.

Eric @ opposite-lock.com > PG; the scalpel wielder 01/07/2018 at 09:29

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Oh, Fuelly is cruel. It shows that stat right on your car’s home page, so you see it when adding a fuel log.

The best is off, it was actually higher and closer to the dash reading. Trying to get to an even number and missing. My fuel economy is awful in cold weather, on short trips, and on snow tires, so the next one will be truly painful.

Nothing > Dr. Zoidberg - RIP Oppo 01/07/2018 at 10:39

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That’s nearly Taco levels of mpg. I averaged 21 on my road trip, closer to 17-18 daily driving.

Dr. Zoidberg - RIP Oppo > If only EssExTee could be so grossly incandescent 01/07/2018 at 13:39

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Unfortunately, no Sportcross here came with a manual. Or maybe it is fortunate, as I’m sure they would add 2 or 3k to the asking price used...

Dr. Zoidberg - RIP Oppo > e36Jeff now drives a ZHP 01/07/2018 at 13:40

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When you’re in stop and go traffic, you can actually see the needle drop. When you’re going slightly above the speed limit on the freeway, you can REALLY see the needle drop.

e36Jeff now drives a ZHP > Dr. Zoidberg - RIP Oppo 01/07/2018 at 13:49

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Got it. Must be 2 extra injectors spraying fuel on the ground.

Wrong Wheel Drive (41%) > Dr. Zoidberg - RIP Oppo 01/09/2018 at 14:23

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This makes me feel pretty good about my STi mileage then! I get similar mileage, depending on how much canyon carving ive done. All highway at 85mph I have seen 21mpg, all canyons I have seen 17mpg, regularly end up with about 19. Gas is so affordable though that its all irrelevant. I imagine I will sing a different tune when premium goes towards $5 again though.