I was driving the other day and for some reason started wondering at what speed the car sips the least fuel. Any ideas? I'm guessing as soon as it kicks into overdrive so that its revving as low as it can in that gear?

 

I would imagine that any car would sip the least fuel when you are moving without using the accelerator. Of course, don't try that on the highway.

 

0 mph is my guess.

 

Actually, if it is moving and in gear the RPM is lower, therefore the engine isn't working as hard. If you were to put it out of gear (park or neutral.) the rpm's actually go up. Of course you could have it in gear and hold down the brake lol.

 

Im talking about highway (or near-highway) speeds). Eg: 70 vs 85

 

I drive 60 miles each day back and forth to work, mostly highway.
Average speed is between 70 & 80.
My average MPG is 27-28, consistantly.

The key to good gas mileage is to maintain a constant rate of highway speed. I don't think you'll do much better at 60 then 70. Once your over 80 the wind resistance is an issue.

A fresh coat of wax makes your car more aerodynamic.

 

are you serious about the"fresh coat of wax".?

 

^^ ROFL. No he's not serious. The shape doesn't change. Air glides no mater what you do to exterior lol.

 

Cruise control helps.I drove 1500 miles to florida with the ac going on 4 tank fulls.Doing 80mph most of the way,I traveled by night.I thought my 98se did good.

 

Cruise Control is only good on flat roads (SC, GA, FL). Anything other than that and it takes more gas when it gas to climb hills (NY, PA, MA).

In the north, going to FL, I was getting about 390/tank. After I got passed the Mason-Dixon line, I eventually ended up getting 430/tank.

(This was in August when I drove from Albany, NY to Clearwater, FL).

 

Do your own research on your car. Do your freeway driving at 65 one tank and change it up on another. Even though these cars look the same, none of them perform exactly the same.

 

Simple, least fuel is used when you decel in gear. Go with SEmy2k2go's suggestion, see what applies to your specific car. Everything else MPG you want to know, search; there are literally thousands of threads on the subject.

 

Long back I used scan gauge, it was a tool to monitor gas mileage.
If I remember correctly for California spec maxima peak gas mileage was at 1800 rpm (approx 58 mph). Scan gauge showed peak mileage as 34mpg.
But in real word all I get is 350 miles to tank which is roughly 22mpg, in city driving.

 

wow we have an MPG thread in disguise here, if your car is an auto you ar ein luck, cause the torque converter kicks in at around 100-110 KM/h...thats when you save the most fuel on the highway, cause when you speed up after that cutoff point the rpm rises and wasted more gas

just get yo self some jdm spoiler yo man and use the downforce on that whip yo !!!!! hehe

 

theres acctually a whole formula based on this, im not sure what it is all i know is that if your on the highway and hit cruise control, it should help. The more you go at a contstant speed, the better it is im guessing.

 

so you "save the most fuel on the highway" just below 100-110kph or just over that? And dont the revs rise every time you speed up? lol

 

well guys! i get 15 mpg city.I don't know what is wrong. Could it be the catalyc converter? I have K&N drop filter and new tires and alignment done! Any ideas...?

 

It's been shown that the optimal speed is between 35 and 50mph. Slower and the drivetrain friction cuts into economy. Faster and air resistance cuts into economy.

Dave

 

62.5 mph, on cruise, flat terrain.

Butt dyno approved.

 

I've heard that waxing creates a smoother surface. So it will probably help, but be minimal.

At highway speeds you can also retract your antena. It makes no sense to take one step forward and one step back.

 

your sig is hilarious lol