How many gallons does it hold? I'm trying to figure out my milage


thanks
DK1

 

Well... you could always pay attention to the gas pump when you fill up. But I won't get preachy, other than a quick google search found this:

http://www.carsplusplus.com/specs197...zx_2_seats.php

 

knowing the gallons it holds doesn't really help unless you drive until its empty.

Fill up, note your miles. Drive. Then fill up again. You'll know how many gallons you just put in and how many miles you drove. Divide those numbers.

My 350Z recently said I got 27.2 mpg on a tank using its onboard computer. I also used the above method to figure out how accurate that is. I calculated 27.9 mpg.

 

yer nizzon iz low ballin gaz my-lidge!

 

What does gaz my-lidge mean?

 

what is gas?

 

The '79-'83 coupes had 21 gallon tanks. The '79-'83 2 + 2's had 18 gallon tanks. But yeah...the proper way is to fill it up. And if you have a tripometer that works. Even better...but if not...just write down your mileage on your odometer. And then when you fill up. Which cost me $75 last night..ouch. Subtract your current mileage from the one you wrote down. And then divide.. how many gallons it took to fill it up. And that will give you your miles per gallon..

 

Are you guys sure the 2+2s had smaller tanks? I have that Datsun 280ZX book that Nissan put out in 78 or whenever. They have the specs in the back and it shows a 21 gallon tank for both 2-seater and 2+2.

 

well, the 280ZX 2+2 wasnt even out in 1978...

 

The '83 owners manual I have makes no distinction between the capacity of the coupe vs. the wagon. 21.75 us gallons.

 

I'm not looking at the 1982 FSM now, but I'm pretty sure Wildman is correct.
The 280ZX 2+2 (starting in 1979) had a smaller tank than the 2-seater.

 

i was wondering because with the prepay stuff I dunno how that works lol


like if you say $20 on pump 2 and use 18 of it do they give your money back to you?


my tanks never "topped off"

 

$20 will get you 4 to 5 gallons of gas... unless your tank is more than 3/4 way full, you will use all $20.


Simple math FTW!

 

Prepay $80. Yes, you go back inside to get your $9 change after the fillup.

1999 was the day of the twenty dollar fillup and the $10 oil change!

 

ok, so is it wierd that i get like 35-38 miles to the gallon on the highway and like 32 in the city? all i have done is a new exhaust (high flo cat and new muffler/pipe) and a k&n filter and cold air intake off of ebay. and when my gauge is at 1/8th of a tank, it takes about 14 gallons to fill it up...so 18 gallons sounds about right in a 1982 2+2

 

are you running HHO ? lol

dont listen to anyone here if you getting that kind of mpg on a z be happy and dont look back

 

18 gallons divided by how many miles?

Maybe your speedo is off.

 

nah man, i dunno...i gotta check it...but i drove from here to charlotte (400 miles) and only used about 3/4 of a tank of gas

 

18 x .75 = 13.5

400 / 13.5 = 29.6mpg ... still a bit higher than normal. Were you driving @ 50mph?

 

yeah, that would be lower cause i was going about 90-95...when i drove home to PA, i only went about 3k rpms, so around 75, then i got 35-38 mph

 

2+2's with airdams rock!!!! its all in the aerodynamics of a 2+2 that cause it to get way better mpg that a coupe, add on a airdam from msa to that already PERFECT design and your running in the 30-35 mpg range!!!!

haha, silly slick top coupe owners with there "power to wait ratios" phssst!!!! all you need is two extra seats!!!!

im goning to have to say that mabe the calculation you mabe on the distance traveled is wrong... did you go by the odometer or maps?(both are crap) so use the intronets

 

ok sorry guys, i really tried to resize my signature, but f*ck photobucket...anywayyyyyyy, im sure the trip mileage was right, and only used around 3/4 of a tank, so i dunno...maybe the exhaust plus the intake on a stockkkk motor helped me out? or maybe the car gods love me

 

Sounds like youre not calculating your milage. You are just guessing.
"About 400 miles and around 3/4 tank of gas" isn't the equation used for tracking milage.
Even with a perfectly running engine, the optimum gearing, and most efficent speeds, a 280ZX can't get more than 35mpg. 75mph or more is not efficent.

Or maybe your entire trip was downhill

 

what is the most efficent speed or rpm?

 

Freefalling at terminal velocity with the engine off