39 MPG!

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ocd
Posts: 69
Joined: 14 years ago
Location: Portland, OR

#16

Post by ocd » 14 years ago

Last 20 us gallons my truck got 34mpg :D . i've been commutting 40 miles/one hour one way for 2 weeks driving closer to 55mph than 60 and trying to stay moving through traffic lights and accelerating gently.
-Noah

i deliver blends of biodiesel -no more!.

82 datsun 720 KC w/sd22
85 volvo 760gle sedan turbo diesel
85 peugeot 505s wagon turbo diesel & parts car
83 chevy k20 suburban silverado 6.2 n/a diesel

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philip
Posts: 1494
Joined: 14 years ago
Location: Southern California, USA

#17

Post by philip » 14 years ago

Very good! :D
-Philip
Passed 08May2008
My friend, you are missed . . .

1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"

ocd
Posts: 69
Joined: 14 years ago
Location: Portland, OR

#18

Post by ocd » 14 years ago

yeah! i was thinking there was something wrong with my little p/u because of the consistent 28mpg but i guess it was just all the short trips and idling and all around town. so yes i'm very pleased.
-Noah

i deliver blends of biodiesel -no more!.

82 datsun 720 KC w/sd22
85 volvo 760gle sedan turbo diesel
85 peugeot 505s wagon turbo diesel & parts car
83 chevy k20 suburban silverado 6.2 n/a diesel

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philip
Posts: 1494
Joined: 14 years ago
Location: Southern California, USA

#19

Post by philip » 14 years ago

Short trips, IDLING at elevated rpm, cooler weather, winterized fuels, colder intake air, more distance spent running in lower gears, old work-hardened tires, lower tire pressures are some of the things that will lower fuel mileage simply due to lower ambient temperatures.
-Philip
Passed 08May2008
My friend, you are missed . . .

1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"

zen
Posts: 118
Joined: 14 years ago
Location: london uk

#20

Post by zen » 14 years ago

28 miles per (Imperial) gallon with the SD33-T in my Rover!!! One can only dream of such high figures...and 39!!!! :shock:
turbo it

(sd33t home turbo set up if anyone is interested..)

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philip
Posts: 1494
Joined: 14 years ago
Location: Southern California, USA

#21

Post by philip » 14 years ago

zen wrote:28!!! one can only dream of such high figures...and 39!!!! :shock:
We do it on miles per US gallon too!

Little SD fours in small "vintage" pickup trucks. :D
-Philip
Passed 08May2008
My friend, you are missed . . .

1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"

zen
Posts: 118
Joined: 14 years ago
Location: london uk

#22

Post by zen » 14 years ago

a price one has to pay for power, 4 wheel drive and fun :wink:
turbo it

(sd33t home turbo set up if anyone is interested..)

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TooManyIdeas
Posts: 120
Joined: 14 years ago
Location: Albuquerque NM -VEGAS BOUND

Backwards fuel milage

#23

Post by TooManyIdeas » 14 years ago

Its weird I seem to get better milage around town than I do on the highway. Maybe I push the engine too hard to maintain the 70-75 MPH range at 6000 ft

But I also noticed that the date on the oil filter said November 2005 (only had the truck a few months not my fault) So I've decided to swap over to Royal Purple. Hopefully that will make things run a smige easier and get those numbers up at 30+ MPG where they belong

Oh yeah the truck rolled over to 100,000 miles on the drive home from work today Whoooo
82 Datsun 720 King Cab Diesel - FOR SALE !!!!
85 Chevy Monte Carlo CL
90 Toyota Pickup -SOLD
05 Kia Spectra 5
02 Dodge Dakota Quadcab
-OOOOOOOOHHHHHHHHH YEAH!!!!!

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philip
Posts: 1494
Joined: 14 years ago
Location: Southern California, USA

Re: Backwards fuel milage

#24

Post by philip » 14 years ago

TooManyIdeas wrote:Its weird I seem to get better milage around town than I do on the highway. Maybe I push the engine too hard to maintain the 70-75 MPH range at 6000 ft.
There is no "maybe" about it. These 720 trucks are NOT geared for those speeds. With the 2WD, 3.88 final gears, and stock 14" wheels, 60 MPH is 2500 rpm. Your best mpg will be in the 45-55 mph range.

You should also read this post and the link therein. :^)
Last edited by philip 14 years ago, edited 1 time in total.
-Philip
Passed 08May2008
My friend, you are missed . . .

1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"

User avatar
TooManyIdeas
Posts: 120
Joined: 14 years ago
Location: Albuquerque NM -VEGAS BOUND

Well that just sucks

#25

Post by TooManyIdeas » 14 years ago

I'm a victim of the dreaded lead foot disease and I do believe it is terminal. :wink: I'm not a slow driver and I never will be. Gonna have to modify the truck hehehehe
82 Datsun 720 King Cab Diesel - FOR SALE !!!!
85 Chevy Monte Carlo CL
90 Toyota Pickup -SOLD
05 Kia Spectra 5
02 Dodge Dakota Quadcab
-OOOOOOOOHHHHHHHHH YEAH!!!!!

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asavage
Site Admin
Posts: 5349
Joined: 15 years ago
Location: Duvall, Wash.
Contact:

Re: Well that just sucks

#26

Post by asavage » 14 years ago

TooManyIdeas wrote:I'm not a slow driver and I never will be.
That's what I said when I was younger. Then the reality of too many speeding tickets and insurance premiums that you wouldn't believe. I got tough: it took two years of constant vigilance, but I trained myself to drive the speed limit. It was hard.

I got my first speeding ticket in something like fourteen years, last month. I got caught in a group of speeders and didn't get moved over before he got me. I didn't argue, I just paid -- I'd saved enough over the years.
Regards,
Al S.

1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.

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philip
Posts: 1494
Joined: 14 years ago
Location: Southern California, USA

Re: Well that just sucks

#27

Post by philip » 13 years ago

asavage wrote: I got my first speeding ticket in something like fourteen years, last month. I got caught in a group of speeders and didn't get moved over before he got me. I didn't argue, I just paid -- I'd saved enough over the years.
Had you been dieseling along in a 720 ... :wink:
-Philip
Passed 08May2008
My friend, you are missed . . .

1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"

User avatar
philip
Posts: 1494
Joined: 14 years ago
Location: Southern California, USA

#28

Post by philip » 13 years ago

philip wrote:Short trips, IDLING at elevated rpm, cooler weather, winterized fuels, colder intake air, more distance spent running in lower gears, old work-hardened tires, lower tire pressures are some of the things that will lower fuel mileage simply due to lower ambient temperatures.
In spite of all these things, the little ol truck pulled off 38 mpg today on a causual (60 mph) round trip to San Diego. (runnin' a customized fuel)
-Philip
Passed 08May2008
My friend, you are missed . . .

1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"

zen
Posts: 118
Joined: 14 years ago
Location: london uk

#29

Post by zen » 13 years ago

hat off to you sir!!!

twice what i get out of my sd33 4x4 (taking in to account your smaller gallon)
and we pay $8 per imperial gallon here too :shock: :shock:
turbo it

(sd33t home turbo set up if anyone is interested..)

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philip
Posts: 1494
Joined: 14 years ago
Location: Southern California, USA

#30

Post by philip » 13 years ago

zen wrote:hat off to you sir!!!

twice what i get out of my sd33 4x4 (taking in to account your smaller gallon)
and we pay $8 per imperial gallon here too :shock: :shock:
For your approval:

Diesel in Orange County per US gallon: $2.98 (USD)

TWICE the mpg you get, Zen? Fewer piston rings equals less internal friction ... a special consideration for vehicle spec SD fours. :wink:

You might study Ford and Honda (in particular) who have over the past decade trended toward narrower and narrower rings (reduced friction) in persuit of higher fuel mileage. These narrower faced rings also exert a little less pressure against the cylinder wall which in turn prefer ligher grade oils (ie, 0w-20) to function correctly. Lighter weight oils in themselves reduce "viscous drag" which is yet another MPG robbing factor faced by vehicle spec engines. :wink:

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-Philip
Passed 08May2008
My friend, you are missed . . .

1982 Datsun 720KC SD-22

"Im slow and I'm ahead of you"

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