I did my search on this site and got a bunch of different hits.....but I want to know for our VQ35HR engine on the highway, what speed/rpm gives the best mpg.

I'm on the highway 90% of the time in the Z going back and forth in Chicago and was wondering how to get the most mpg.

 

60-70mph in 6th gear.

TK

 

you can experiment yourself using the in-car calculator.... find a flat stretch, start going 60, reset calculator and wait.. note mileage. repeat at 65, 70, 75, etc...

Don't forget to come back and tell us what you found out =)

 

i did this! someone once told me keeping rpm between 2000-25000 rpm gives the best mileage....So @ 60mph i used the in car calculator and got 3 different numbers all together, 27.1, 26.0 and 28.9 .

At some points on the highway the road was hilly so maybe thats why i got diffrent readings. I also did this at 70-75mph and got something similar but cant reacall if i saw more than 26mph in the speed range.

my aim is to get the best mpg at the highest speed but hey if 60mph vs 75mph gives me the most, then obviously il do 60.

thanks in advance everyone.

 

i get an average of 27-28 going 55 mph in my 5AT
going 65 on the interstate gets me 25-26

i have yet to try 45 mph

 

I have gotten 31 mpg. I put my car on cruise control and I was going approximately 60mph.

 

i have gotton 30+ going 55-60. hills make it worse/better depending on if your going up or down.

 

i do notice a huge difference between going 75 and going 65. the best i have ever managed is about 23-24. thats 90% highway mostly going 75

 

i find i get the best at about 70mph.

 

 

The only way to truly see the difference between MPG VS MPH is to cruise on a "strait" "flat" freeway and try every MPH on cruise control. My car gets the best on the way to work it I just leave it at 73-74 the whole way, and if I have a passenger its needs to be at 77-78 for the MPG. Try it.

 

wow i can barely get 17mpg on the highway these days....best speed/rpm i experience is 0mph/0rpms I save the most gas at that point.

 

yeah... i get 16 in city haha. i filled up 2 days ago and am already down to half tank. on the highway its usually up to 20

 

You guys are driving a z and complaining about gas? Gas is expensive everywhere now and if you really want to save money on gas get a HONDA. LOL

 

im not complaining just answering a question. I love wasting gas and crapping on the environment with my test pipes

 

Ironically, I just switch to the 350Z from an '06 Honda Civic, and the fact that I'm getting half the mileage than I was before is absolutely shocking.

Oh well, the fact that it's a damn fun car makes up for it.

 

well I was a bit concerned about gas millage when I first got my Nis...but then my boss pays for my gas...so F it!...lol

 

Best I've done was 53 mpg going slightly downhill, at about 40 mph in 6th gear over 5-6 miles.

 

Lol sharaabis shouldn't be driving anyways
but yeah 60MPH on the freeway with cruise usually does the job
even though thats pretty rare for me to do

 

I dont think Ive ever gotten to 20mpg with my car. My best is around 18 with me normally averaging 15-17. Granted Im almost always doing about 80-85 or driving like I stole it but damn you guys are making me wanna slow down...shyt who am I kiddin fawk gas mileage its a Z