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14 MPG fair in this case? #4651245
01/30/18 03:51 PM
01/30/18 03:51 PM
Joined: Apr 2013
Posts: 2,333
The Northeast
mclasser Offline OP
mclasser  Offline OP
Joined: Apr 2013
Posts: 2,333
The Northeast
So I've given the Infiniti to my nephew to drive. He's a good kid and needed a car. His driving style definitely falls under the severe category:

- Only city driving.
- 3 mile round trips to school.
- Stop-and-go driving when school lets out.
- Small town so grocery store, fast food, friends' houses are only a few miles away.
- Morning idle time is 5 minutes to clear up windows and get interior toasty.

He fills up premium gas (mfg recommended) and routinely checks fluids & tire pressure. Current fluids are Castrol 5w40 syn oil and MaxLife ATF. I've asked him to hand calculate his MPG and he gets around 14. Considering this driving style is pretty hard on a 16 yr old car in the winter -- fluids don't fully warm up, fuel dilution, multiple starts a day -- is 14 MPG fair with winter blend gas? The EPA city estimate is 17.


2018 Hyundai Elantra VE -- 4K
2013 Honda Pilot EX-L 4WD -- 56K
2002 Honda Accord EX-L -- 211K

Re: 14 MPG fair in this case? [Re: mclasser] #4651248
01/30/18 03:53 PM
01/30/18 03:53 PM
Joined: Mar 2016
Posts: 949
PA,US
HemiHawk Offline
HemiHawk  Offline
Joined: Mar 2016
Posts: 949
PA,US
for sure, in almost any vehicle I've owned I've noticed roughly a 3mpg hit in winter.


2016 Nissan Frontier Pro4x
2017 VW GTI sport
1995 Mustang GTS
Re: 14 MPG fair in this case? [Re: mclasser] #4651289
01/30/18 04:27 PM
01/30/18 04:27 PM
Joined: Oct 2015
Posts: 440
MN
TmanP Offline
TmanP  Offline
Joined: Oct 2015
Posts: 440
MN
Yep, under similar circumstances (short trips just around town) and in the dead of winter my Buick gets 15 or so, the Sienna 12-15 and the Silverado 9-12.
I'd say he's right in the ballpark.
Most cars will do poorly given these conditions but bigger, heavier cars with larger engines will do worse.
Short tripping is hard on cars, so I try to get it on the highway and fully warm it up regularly.
I also change oil more frequently.
Aside from this, it's all you can do.


2012 Toyota Camry 2.5 30,000 mi
2015 Chevy Silverado LT Z71 5.3 V8 30,000 mi
2010 Toyota Sienna 3.5 V6 150,000 mi
Re: 14 MPG fair in this case? [Re: mclasser] #4651325
01/30/18 04:46 PM
01/30/18 04:46 PM
Joined: Jul 2015
Posts: 3,794
New England
madRiver Offline
madRiver  Offline
Joined: Jul 2015
Posts: 3,794
New England
5 min warm up is killing your MPG driving 3 miles round trip.

Re: 14 MPG fair in this case? [Re: mclasser] #4651341
01/30/18 04:56 PM
01/30/18 04:56 PM
Joined: Nov 2011
Posts: 1,059
Lyndhurst NJ
Audios Offline
Audios  Offline
Joined: Nov 2011
Posts: 1,059
Lyndhurst NJ
Yea the warmup is a long time, Id cut it in half max, and Im sure theres seat heaters in the car too. That does sound about right though, these engines really get good mileage on the highway, otherwise around town they guzzle it. Plus we all remember how we drove when we were 16/17

Last edited by Audios; 01/30/18 04:56 PM.

2002 VW Golf TDI-Mobil 1 5/40 TDT
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL
2005 BMW M3 BMW Twin Power 10/60
2003 BMW M5-Fuchs 5/40
1998 BMW M3/4/5 Fuchs 5/40
Re: 14 MPG fair in this case? [Re: mclasser] #4651547
01/30/18 09:22 PM
01/30/18 09:22 PM
Joined: May 2015
Posts: 965
Missouri
gabriel9766 Offline
gabriel9766  Offline
Joined: May 2015
Posts: 965
Missouri
I dont even figure mpg in the winter. normally i average 28-31mpg combined in the summer with the ac on. If i do an all highway trip with the car in ac eco mode i can get 39mpg at 70mph in my Malibu.


2015 Malibu LT 2.5L PPPP 0w20 46.1K
2007 Escape XLT 3.0L 5Q STHM 5w30/1Q MC full syn 5W20 115K
2010 Fusion SE 2.5L MC 0w20 110K
2008 Escape XLT 2.3L MC 5w30 187K
2007 Fusion SE 2.3L- 173.5K STHM 0W20
Re: 14 MPG fair in this case? [Re: mclasser] #4651635
01/30/18 11:47 PM
01/30/18 11:47 PM
Joined: Feb 2008
Posts: 4,727
Texas
FZ1 Offline
FZ1  Offline
Joined: Feb 2008
Posts: 4,727
Texas
Yep. The thick oil,waiting in the fast food drive,the warmup,and the short tripping are doing it. Lucky to get 14. That oil seems too thick,is the oil synthetic?

Re: 14 MPG fair in this case? [Re: Audios] #4651642
01/31/18 12:03 AM
01/31/18 12:03 AM
Joined: Sep 2014
Posts: 1,422
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,422
Seattle-ish, WA
Originally Posted By: Audios
Yea the warmup is a long time, Id cut it in half max, ...


Cut it in half? I'd cut it to shreds. 30 seconds or so, then keep it under 2000 rpm until the temp gauge is swinging past at least 1/4. Then turn on the heat. Take care of the machinery first, not your fanny. If he can't manage or adapt to that, then let him go old school. Microwave a potato, let him carry that in his hands while he walks through the cold to keep him warm. Then he can eat if for lunch at school, after leaving it near the fire during the morning while he sits through his lessons. Just like the kids on "little house on the prairie." wink

Seriously, that's a horrible routine in the winter morning for the car - fuel dilution, etc. Horrible. Teach him.

Also, is MaxLife the best atf for that older vehicle? I don't know about infinity transmissions, but I have an Acura and lexus from that vintage, and they WAY prefer DexIII thickness fluids and not modern low-viscosity ones. Just a thought. Really loving Castrol Transmax HM in DexIII/TIV original spec applications right now, after a lot of experimenting. Just a thought, may not apply to that car.

Re: 14 MPG fair in this case? [Re: mclasser] #4651765
01/31/18 08:27 AM
01/31/18 08:27 AM
Joined: Oct 2015
Posts: 2,660
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,660
Balearic Islands , Spain
Cut that warmup time, your kids are not going to freeze because the interior is not toasty warm...


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: 14 MPG fair in this case? [Re: mclasser] #4651766
01/31/18 08:30 AM
01/31/18 08:30 AM
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,480
Ontario, Canada
30s warm up. If you can see, start driving. Otherwise you are just throwing fuel out the tailpipe.


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: 14 MPG fair in this case? [Re: mclasser] #4651785
01/31/18 09:09 AM
01/31/18 09:09 AM
Joined: Dec 2011
Posts: 4,754
North Carolina
rooflessVW Online content
rooflessVW  Online Content
Joined: Dec 2011
Posts: 4,754
North Carolina
Mileage seems about right. You're under the EPA estimate for city because of the idle time, cold weather, and age of the engine.


"Zed's dead baby, Zed's dead."
Re: 14 MPG fair in this case? [Re: mclasser] #4651827
01/31/18 09:59 AM
01/31/18 09:59 AM
Joined: Oct 2002
Posts: 36,304
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline
Joined: Oct 2002
Posts: 36,304
Great Lakes
Yup, 14 mpg sounds quite possible under these circumstances.


'02 530i (Edge 0W-40)
'15 Q5 3.0T (Edge 5W-40)
'18 Charger SRT (FF)
Re: 14 MPG fair in this case? [Re: mclasser] #4651956
01/31/18 11:44 AM
01/31/18 11:44 AM
Joined: Apr 2013
Posts: 2,333
The Northeast
mclasser Offline OP
mclasser  Offline OP
Joined: Apr 2013
Posts: 2,333
The Northeast
Cool, good to know it seems right.

I agree that the warm up time is too much, especially With heated seats and steering wheel.

MaxLife works great. This tranny is known to beat up ATF so a syn fluid is a necessity.


2018 Hyundai Elantra VE -- 4K
2013 Honda Pilot EX-L 4WD -- 56K
2002 Honda Accord EX-L -- 211K


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