Go Back   Infamous Nissan - Hardbody / Frontier Forums > Infamous Nissan > General Discussion

Reply
 
Thread Tools Display Modes
Old 06-10-2018, 03:51 PM   #1
VulgarNinja
SurferTeacher
 
Join Date: Jun 2018
Location: california
Posts: 1
Vehicle: 1997 nissan hardbody
Thanks: 0
Thanked 0 Times in 0 Posts
Default MPG Police

Hi all,
I am new to this site so forgive me, I know this topic has been discussed at length somewhere. While I search feel free to give your $.03.

I get 17-18 mpg regularly in my 1997 king cab auto; rarely 21-22 mpg. I have never broken 23 mpg, not ever. I use ARCO regular. I love this truck (had an '89 standard cab manual before). I see multiple reports of 25+mpg. Any tips would be appreciated.

Safe travels!
VulgarNinja is offline   Reply With Quote
Old 06-10-2018, 05:04 PM   #2
Hands On
XXXXXXXXXXXX
 
Hands On's Avatar
 
Join Date: Aug 2017
Location: United States
Posts: 326
Vehicle: A Hardbody
Thanks: 110
Thanked 60 Times in 56 Posts
Default

My mileage is about the same as yours. Best logged tank was 22.8 mpg on last fill mostly fwy. Here's a clip of my Fuelly page. I drive fairly fast on the freeway for the gearing of this truck, but I could probably break 25 mpg on a road trip 100% fwy driving. If I'm not mistaken autos have higher gearing.

__________________
Yep.

Last edited by Hands On; 06-10-2018 at 05:16 PM.
Hands On is offline   Reply With Quote
Old 06-10-2018, 05:44 PM   #3
mytmouz
 
mytmouz's Avatar
 
Join Date: Sep 2011
Location: Pelahatche, MS
Posts: 874
Vehicle: 1989 Nissan Hardbody
Thanks: 47
Thanked 140 Times in 115 Posts
Default

My grandfather bought my 89 auto truck new, it never got better than 15mpg from the day it left the lot...

I have owned many 620, 720, and D21 nissans, 20 and 22r (and 22re) powered Toyotas, and a bunch of chevy LUVs, and none of them EVER got the mileage everyone else has claimed...
mytmouz is online now   Reply With Quote
Old 06-10-2018, 05:57 PM   #4
david29
Administrator
 
Join Date: Sep 2008
Location: Spring(Houston), Texas
Age: 48
Posts: 5,867
Vehicle: 1987 Nissan King Cab
Thanks: 28
Thanked 429 Times in 392 Posts
Default

10% ethanol in most parts of the country will give you lees MPG's than factory specifications. Keeping maintenance up, proper air pressures, stock size tires, correct oil viscosity and speed all contributes to better gas mileage. Case in point. Before the introduction of ethanol(10%), I could get 300-325 miles a tank. After the introduction of ethanol, 250 miles is about the best I could get. This was in either of the 2 trucks I had in that time era. Both were king cabs, 2wd, one with auto, other w/5 speed.
I would do speed limits everywhere to try and get better numbers. Max on highway or freeways, Id do 60mph.
__________________
My stable of Nissan trucks includes:
1987 Nissan King Cab(full frame off Restoration).
david29 is offline   Reply With Quote
Old 06-10-2018, 06:41 PM   #5
SBJ
Total Buzzkill
 
Join Date: Nov 2016
Location: OR
Posts: 1,592
Vehicle: '90 D21 4cyl 5spd 2wd
Thanks: 170
Thanked 187 Times in 170 Posts
Default

I seem to average around 20mpg no matter how or where I drive it. It might get 22mpg going downhill with a tailwind. Keep in mind these have the aerodynamics of a brick.
SBJ is online now   Reply With Quote
Old 06-10-2018, 07:03 PM   #6
cadillacdude1975
The Gear Jammer
 
cadillacdude1975's Avatar
 
Join Date: Apr 2013
Location: Chattanooga, TN
Age: 46
Posts: 8,673
Vehicle: 87 D21 SE KC V6 2wd 5sp & 86.5 V6 SE auto
Thanks: 315
Thanked 955 Times in 884 Posts
Default

mine averages 18 with NON ethanol 93 octane. i let my mom use it one weekend and she got over 22 mpg.............and i still dont know how the hell she did that, other than the fact she is in her late 60s.
__________________
"Im officially lost" - wildbill
cadillacdude1975 is offline   Reply With Quote
Old 06-10-2018, 08:27 PM   #7
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 49
Posts: 8,685
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,247
Thanked 1,082 Times in 954 Posts
Default

Quote:
Originally Posted by VulgarNinja View Post
I get 17-18 mpg regularly in my 1997 king cab auto; rarely 21-22 mpg. I have never broken 23 mpg, not ever. I use ARCO regular. I love this truck (had an '89 standard cab manual before). I see multiple reports of 25+mpg. Any tips would be appreciated.
What size tires? Those make a big difference.

How do you accelerate? Do you stomp on the gas at red lights or let the engine slowly get you up to speed?

How fast do you go on the freeway? If you stick to the 55-MPH that these trucks were designed for you will get much better MPG than if you are cruising the interstate at 80.

Quote:
Originally Posted by Hands On View Post
My mileage is about the same as yours. Best logged tank was 22.8 mpg on last fill mostly fwy. Here's a clip of my Fuelly page. I drive fairly fast on the freeway for the gearing of this truck, but I could probably break 25 mpg on a road trip 100% fwy driving. If I'm not mistaken autos have higher gearing.

Hey! I thought I was the only one on here using that site. I've been tracking my mileage for a while.

__________________
Joe (not a mechanic!) Don't have an account? EMAIL ME
Free Service Manuals: https://ownersmanuals2.com/make/nissan
Walk-through: Checking Nissan Trouble Codes
1994 VG30E to VG33E with H256 Cams

jp2code is offline   Reply With Quote
Old 06-10-2018, 10:09 PM   #8
h.stickeye
 
h.stickeye's Avatar
 
Join Date: Nov 2014
Location: Brisbane AUSTRALIA
Posts: 1,028
Vehicle: 91 Nissan Navara d21 Single Cab
Thanks: 147
Thanked 109 Times in 94 Posts
Default

I get 19-20 mpg no matter how I drive. 4 cyl mildly worked z24 32/36 weber. I used to get around 26mpg when my truck was completely stock.

I only use non ethanol 95 tho and 98 every now and then

Last edited by h.stickeye; 06-10-2018 at 11:03 PM.
h.stickeye is offline   Reply With Quote
Old 06-11-2018, 01:00 AM   #9
Deerhurst
4/86 SE-V6 2 tone 4x4 HB
 
Deerhurst's Avatar
 
Join Date: Apr 2013
Location: Oregon
Posts: 5,151
Vehicle: 1986.5 Hardbody
Thanks: 707
Thanked 480 Times in 443 Posts
Default

I wish non ETH was as cheap up here as it is in the south. It helped me a ton. We have crap fuel and our crap governor added another some 60 cents per gallon of tax to our fuel then taxes the crap out of every environmental friendly option for commuting. We lack sales tax yet there is explicitly a sales tax on bicycles! Really!?!?!? /rant.





With my old motor (VG30i), a set of headers, 235/75/15 BFG KO tires and manual hubs I could regularly get 25MPG at around 70MPH. Usually did roughly 22-23 going back and forth around 65MPH and going over a pass twice each day.



Fast forward a few years and I've now got a VG33i with 31x10.5x15 BFG KO2 tires (things are stupid heavy), alloy wheels, headers, emissions delete (still have a cat), Warn hubs, electric fan, grill guard, and fender flares. Last 2 fill up were 17.5MPG including a little city then climbing from 300ft to over 6000ft elevation and dropping to 4200ft elevation. About 120 miles of that were probably 65MPH average and about 50ish miles were 70MPH. Then I did another 85 miles on premium fuel (it might help my cold starts with stupid timing numbers) at 17MPG with a really heavy over built single axle trailer and a gnarly head wind. I was almost on the floor to maintain 60-65MPH.



I don't think I'm fully tuned yet.


Most auto have lower rear end gears, especially in the 4x4. Most 4x4 autos are a 4.6:1 rear end. The manuals were 4.3:1 standard. I have an oddball 4.11:1 rear end and a 5 speed. I turn 2500RPM at 65MPH.
__________________
1986.5 SE-V6 4X4 D21 Hardbody
Pacesetter Long Tube Headers
Morimoto Mini D2S HID Projectors and Hella 500s
VG33i
Deerhurst is offline   Reply With Quote
Old 06-11-2018, 10:35 AM   #10
jp2code
Software Developer
 
jp2code's Avatar
 
Join Date: Dec 2011
Location: Longview, TX [USA]
Age: 49
Posts: 8,685
Vehicle: 94 LB 2x4 Manual VG33e
Thanks: 1,247
Thanked 1,082 Times in 954 Posts
Default

I hope your bad MPG numbers are due to timing issues. The only other thing I can think of that makes your engine different from mine is the cam selection. My MPG numbers are not as high as yours, but yours should not be that low.
__________________
Joe (not a mechanic!) Don't have an account? EMAIL ME
Free Service Manuals: https://ownersmanuals2.com/make/nissan
Walk-through: Checking Nissan Trouble Codes
1994 VG30E to VG33E with H256 Cams

jp2code is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 12:18 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.