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Old 06-12-2018, 09:32 AM   #1 (permalink)
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Kristin's Impala FFV - '10 Chevy Impala LT
90 day: 25.5 mpg (US)

XFE Coupe - '09 Chevy Cobalt XFE
90 day: 38.91 mpg (US)

Kt's Cobalt - '10 Chevy Cobalt LT
90 day: 27 mpg (US)

Penny's Rogue - '15 Nissan Rogue SL AWD
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Cam's Rogue - '11 Nissan Rogue SV AWD
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2017 Elantra SE

Picked up a 2017 Elantra SE (base model) last week, pretty impressed so far. 2.0 "Atkinson cycle" engine with 12.5:1 expansion ratio with 6 speed auto. Son followed me home in dealer driving it 50 miles at 73 mph, the 25 at 58. 52.9 indicated for that trip.

Topped it off Sunday and I used it for my commute for 2 days to compare to my Cobalt XFE(40 mpg average), drove as similar as I could, except it has cruise control so set at 57-59 range, little bit of N coasting. 53.7 indicated, 49.6 calculated but pretty short fill of about 4 gallons. It does want to engine brake after letting off the gas so N coasting is helpful. Other owners calculate about 5-7% optimist factory gauge.

With cruise set at 57, if you pick up speed going down hill, it will downshift to limit speeding. Shifts a lot more than I'm used to with 6 speed, the first 3 go by real quick. Plenty of power, smooth and quiet.

Will be taking it on a road trip to Mt Rushmore this weekend so will rack up a few full tanks.


Last edited by roosterk0031; 06-12-2018 at 11:53 AM..
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Old 06-12-2018, 10:11 PM   #2 (permalink)
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That's really impressive. Actually, I'm impressed with Hyundai's whole lineup these days; they're the only manufacturer with air curtains and grill shutters on every model, and the packaging on the Sonata plug-in is quite impressive--no loss of trunk space compared to the non-hybrid.

Someone at the university here--I'm guessing in the chemistry department--has an Ioniq with the license plate "CVLNT."
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Old 06-13-2018, 05:00 AM   #3 (permalink)
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Excellent! I'm likewise consistently impressed with Hyundais. It's numbers like that which are at least partly responsible for that.
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Old 06-13-2018, 09:08 AM   #4 (permalink)
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Kristin's Impala FFV - '10 Chevy Impala LT
90 day: 25.5 mpg (US)

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90 day: 38.91 mpg (US)

Kt's Cobalt - '10 Chevy Cobalt LT
90 day: 27 mpg (US)

Penny's Rogue - '15 Nissan Rogue SL AWD
90 day: 27.09 mpg (US)

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90 day: 27 mpg (US)

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90 day: 43.96 mpg (US)
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Drove a little without cruise last night, it doesn't down shift to engine brake when cruise is off, so I bet a careful foot could beat cruise by avoiding down shift going up and down hills, at least the hill I drive. If I needed a new car for myself I'd be looking for a 6 sp manual.

Daughter working at Mt Rushmore for the summer car is acting up, so driving this one out and that one back to do some repairs before college resumes.

Tires were at 38 psi when I got home so hot, bumped them to 40, placard says 36 recommended.

Last edited by roosterk0031; 06-13-2018 at 09:37 AM..
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Old 06-13-2018, 04:18 PM   #5 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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Hyundai is an excellent car maker. Rented a 2012 or 2013 Sonata a few years ago (for work), and that auto gear box was amazing. Sixth gear sat way down at like 1900 rpms at 55 mph or something like that. Just loved the car all around too.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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Old 06-14-2018, 11:56 AM   #6 (permalink)
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Kristin's Impala FFV - '10 Chevy Impala LT
90 day: 25.5 mpg (US)

XFE Coupe - '09 Chevy Cobalt XFE
90 day: 38.91 mpg (US)

Kt's Cobalt - '10 Chevy Cobalt LT
90 day: 27 mpg (US)

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90 day: 27.09 mpg (US)

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90 day: 27 mpg (US)

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90 day: 43.96 mpg (US)
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The Elantra's is running 1740 (calculated) rpm at 55, it's overall gearing in od. is 2.3562 vs the Cobalt XFE at 2.5 with both wearing the same size tires(195-65-15) is at 1850. Wife drove it some yesterday then we took it 25 miles one way to HS baseball game. Down to 47 mpg indicated when we go home, or I should say I brought it back up to 47 mpg after her typical person driving (AC full blasting and no coasting). Little over 150 miles into this tank.

A 6 speed Manual elantra is at a disadvantage with a final gearing of 2.74, 2026 rpm @ 55.

My Cobalt is only about 40 lbs lighter than the manual, 90 lbs lighter than the automatic.

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Old 06-14-2018, 12:30 PM   #7 (permalink)
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Black and Green - '98 Honda Civic DX Coupe
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90 day: 61.77 mpg (US)

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That's right. I remember now trying to figure out how close to right between 1500 and 2000 the tach needle was, IIRC.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

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Old 06-14-2018, 01:16 PM   #8 (permalink)
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Join Date: Jan 2011
Location: Iowa
Posts: 930

Kristin's Impala FFV - '10 Chevy Impala LT
90 day: 25.5 mpg (US)

XFE Coupe - '09 Chevy Cobalt XFE
90 day: 38.91 mpg (US)

Kt's Cobalt - '10 Chevy Cobalt LT
90 day: 27 mpg (US)

Penny's Rogue - '15 Nissan Rogue SL AWD
90 day: 27.09 mpg (US)

Cam's Rogue - '11 Nissan Rogue SV AWD
90 day: 27 mpg (US)

Elantra - '17 Hyundia Elantra SE
Team Hyundai
90 day: 43.96 mpg (US)
Thanks: 144
Thanked 155 Times in 133 Posts
Thinking the other thread on good 100 mph cruiser, if it could pull OD, 3170 rpm. 4130 rpm in 5th at 100 mph.

CD of 0.27, 23 ft sq of frontal area, plug that into the aero calculator

Automobile-Catalog the complete Catalog of Cars, car specs database

20 mpg at 100 mph, 51 mpg at 55, 32 at 75, hopefully it doesn't drop that far this weekend. Don't know if I should change the engine efficiency, can't find any claims by Hyundai.


Last edited by roosterk0031; 06-14-2018 at 01:31 PM..
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