Cruise control ON. Ambient temperature 54 degrees.

 

I get around the same mpg in my 350z, although I have no cruise gotta be delicate with the throttle.

I can sometimes get around 33mpg with the a/c off and going right at 60.

aem intake, skunk2 spacer, hks exhaust, under drive pulleys

 

did you reset the MPG gauge while cruising on the freeway?

 

Yes. Cruise control ON. Reset MPG. Drove about 15 miles. MPG will go 33 32 31 then settle at 30. That is the MPG I posted.

 

do u want a cookie

 

i do

 

if i drive behind you i will go insane

 

I have a roadster so it’s a little less aero than the coupes, but sometimes I can match that mileage at that speed. One thing though, I disagree with the consensus that use of the cruise control aids gas mileage.

At one time the surface of the earth was all jagged ridges and deep valleys; with eons of erosion, these have become the rolling hills crossed by the highways and byways of America. (Even relatively flat areas still bear some remnants of these prehistoric protuberances) I have a good sense for the way my engine labors up and races down these hills. When going for best MPG on a mostly empty road, I let the speed effortlessly increase on the downhill in order to maximize momentum for the ensuing uphill. Approaching the crest of the uphill, I hold the throttle steady to the point of even dropping a bit under the speed limit knowing the car will soon regain speed on the downhill.

Contrast this to the dimwitted cc that will cut speed instantly on the down slope and quickly bury the throttle on the upslope to slavishly adhere to some arbitrary set speed.

Even with the odd lapse of concentration, I feel I have better throttle control than the average cruise.

 

Golf clap.

 

bone stock car with no alterations of wheels i take it?

 

Correct. I am religious about tire pressure and keep it at 35PSI.

 

 

not bad. i never go by the computer calculated thing though. I don't trust them. I calculate based on fuel consumption used and mileage.

30mpg should be attainable for these cars though.

 

Jesus... I get 21 mpg at ~70 mph on my 06' G35 Coupe 6MT if I'm lucky while on cruise control for an entire tank of gas...

I only have and intake, exhaust and 19" TE37s...

WTF??

 

EPA estimates for every 5mph over 55mph you lose about 1mpg due to the exponential increase in drag.

So that combined with any stop lights 21 isn't bad.

also, cruise control destroys gas mileage. Cruise control sets a constant speed, not constant TPS. One of the keys to great gas mileage is constant TPS. that's what we use for hypermiling. If you come upon a hill at 70mph the cruise control wants to keep 70mph so it will slam down the pedal and eat tons of gas trying to accelerate going upa hill. Acceleration up a hill eats fuel fast.

 

And I just drive my car, simple and easy. Cruise is usually set at 78 on the road to California. I average 26 mpg on the way.

 

Sounds odd. I get 30-34 on the highway at 60-70ish in my DE with > 100k miles. Between 75-80 it starts to drop back down but wouldn't be anywhere near 21 even at that speed (strictly highway driving). Is 21 by computer calculation or by manual fuel consumption/mileage?

 

That's what I thought...


Manual calculation at the pump after I fill up.

 

I also get this freakishly high mpg in my '03. Average is 32 at 75 mph.

Don't really know why it varies so much but my buddy who drives an '08 was shocked when I told him.

 

This may be difficult to believe but I posted this in the 370Z forum for a reason. You know. 370Z MPG. Get it.