Just curious what you guys get for gas mileage on your B18C swapped cars. Mine is a P72 (GSR, duh) B18C so I'm most interested in those and the USDM version B18C1...

Here's what I have and my fuel economy:

1998 Civic DX 4 door
B18C engine and trans
S2 Pro Series intake manifold
K&N FIPK
DC 4-2-1 1 piece header (soon to be replaced by HyTech replica)
Recent tune up.
Currently 2" exhaust; getting 2.5" exhaust when new header goes on to be ready for future mods.
62 mm throttle body

OK, on a recent trip to Kansas City (about 180 miles each way) I got 34.8 mpg. Right after I did the swap, when I was still in thrash it mode, I got between 25 and 27 with all city driving. Now, I'm going between my P72 and P73 ECU's trying to figure out which one works best with my new intake.

 

95 coupe
b18c1
aem intake
dc header
greddy exhaust

on my drives from fresno to sac (also ~180mi) doing a constant 80mph i average 27-28mpg. i could squeeze out a few more if i didnt drive so fast, but what the hell.

 

yeah but what about.. you know.. 65mph
I have a D now and i enjoy 35-40mpg on the highway. Can't you get at least 30-32mpg in a b18?

 

Yes, you can get 30 if you don't have a lead foot. I live in AZ and so I must have A/C... Lately, with A/C and about 50/50 city/highway I get about 280 - 290 on 1 tank. I have a 99 EX w/ a B18C swap. When I'm not running A/C and drive normally, (i.e. don't go into VTEC) I can squeeze out about 330 on 1 tank. I have an 11 gal tank. So you can get 30 if you drive slow..

 

1998 civic coupe
B18C1 swap
ctr cams
Injen CAI
dc header
greddy exhaust
tuned on hondata

i dont go by miles per gallon, i usually go by miles per tank and with that saying i squeeze about 225-250 miles to a full tank. Maybe a little less when my foot is through the floor board.

 

225 miles / 12 = 18mpg..
Yeah. that's pretty bad. is that all highway? i hope not. I'm sure those cams don't help.

Anyone here got a fairly stock b18.. what's your highway mileage?

 

No thats just going to and from work and a little bit of play in between. but i dont usually drive the highway. thats what the bike is for.

 

I got 36mpg in my EG if I drive normally.

 

about 17-21...
thats what boost will do

 

I have gotten 334 miles in a B16 92 vx, highway and city driving, going 140 km/h on the highway.

The was the only time i have filled the tank above half.

 

i have a pretty much stock gsr swapped ek sedan and i get around 31.5 mpg !!!!!!!!!!! i think that is good as hell considering gsr didnt even get that good of gas mileage

 

'94 Civic DX with '94 GS-R swap...I/H/E, Exedy clutch, Fidanza flywheel, and low comp. forged internals (boost later)...

When I'm driving back and forth to school (70+ highway miles everyday) I get ~30, but I've seen 32mpg when I was doing 65 and accelerating slowly.

During the summer when I'm just around town going back and forth to work I get 27-28, depending on how I drive.

 

first of all I run the same set up b18c1 dc sports 4-2-1 and fidanza flywheel and stage 3 clutch with a chiped ecu with 2.5" exhaust what I wanted to tell you is that 2.5" is good for all motor setups but something with limited mods including no internals it is not I am losing hp due to not enough backpressure and it pops and makes funny sounds due to the oversized exhaust but at the same time I dont run a catalyst and if you do you may be able to keep enough backpressire to make it mork right. and the other thing is that I get like 24-26mpg so there you go

 

Bone stock B18c5 with stock eg exhaust. I was running a chipped ECU and getting about 200 miles per tank. Since then I've gone back to a stock ECU with factory fuel mapping and with 70/30 highway to street driving, I'm at 270 on this tank and need to fill up. I'll probably put approx. 10 gallons in.

So the short of it is I'm getting somewhere around 24 - 27 MPG with easy driving.

 

i have a stock b18c in my ej6 sedan, and i get an average of 32mpg. one time i got 36 but that was without vtec once.... like that will happen again.

 

99 ex coupe
b18c itr swap
cold air intake

25-26 mpg on 91 octane

 

30mpg highway (i drive pretty fast)
24-26mpg city