what mph do u get ur best mpg......

[turbomaxx]

if you go 0mph you get 0mpg.

and save X amount of dollars in fuel.


Trust me. It makes sense.

[accordaffair]

I just drove to GA a couple days ago, we averaged about 80 mph and I got 22-23 mpg. Now I get about 24 in the city with just me doing about 60 max. On the trip we had 4 people in the car and their luggage.

[owequitit]

It depends on the car.

Why?

1) Your power curve is a "curve", hence why it got that name. Somewhere on this curve, will be a best point.

2) Your aerodynamic drag, and road drag (friction) have a curve. Somewhere on this curve, will be a lowest point.

3) Your fuel consumption at different engine speeds would be in a curve. Somewhere on this curve, will be a lowest point.


Basically, everything would be defined by a curve.

At some specific point, you will get the best RPM, the best HP per fuel burned, the best gearing, and the best aerodynamic drag. When the total of all of the variables added up, is the lowest possible answer, then you will get your best MPG at that point. You might not be at the lowest point on all curves, but overall, they will average out to be the best total.

Also, slower is not better, and it will not necessarily occur at the same speed for all vehicles. That was simply a dumbed down answer for stupid people.

In my car, the sweet spot seems to be right between 80-85MPH. 75 is really close, but much below that an mileage drops noticeably. Pretty much approaching 90 it also drops noticeably.

Now, also keep in mind that there are other things that will skew your mileage way more. Like not cruising at a constant speed.

[turbomaxx]

Now, also keep in mind that there are other things that will skew your mileage way more. Like not cruising at a constant speed.

I don't get that last part of your post. Are you saying that cruising at constant speeds HURTS or HELPS your fuel mileage? Because I always believed that cruising at a constant speed would help fuel mileage. Is that correct?

[owequitit]

I don't get that last part of your post. Are you saying that cruising at constant speeds HURTS or HELPS your fuel mileage? Because I always believed that cruising at a constant speed would help fuel mileage. Is that correct?

Cruising at a constant speed DOES help MPG absolutely.

But varying your speed back and forth and back and forth would make a lot more difference than say cruising steady at 75MPH vs cruising steady at 80MPH.

[verothacamaro]

and save X amount of dollars in fuel.


Trust me. It makes sense.

But the distance traveled is zero...which brings us to todays question....


what MPH do you get your best MPG?

[Lil' Whitie]

when i drove from cleveland to st. louis making three stops.

i did around 70 mph when i got out of cleveland and when i hit indiana i averaged 75, and then back to 70 in Illinois.

i have a stock f22, 5-spd and no cruise and tried to maintain my speed all the time.

averaged 36mpg with just me and my mom and trunk full of luggage.

no constructions just three stops thats it.

i say on a flat windy day ur car can get best mpg at 70mpg cuz i feel tha the power curve is right around netural there.


but on really windy and hilly areas i say 80 is good....


but then again i heard of a guy get 50mpg in a ford tarus doing 45mph for a whole tank....

[owequitit]

when i drove from cleveland to st. louis making three stops.

i did around 70 mph when i got out of cleveland and when i hit indiana i averaged 75, and then back to 70 in Illinois.

i have a stock f22, 5-spd and no cruise and tried to maintain my speed all the time.

averaged 36mpg with just me and my mom and trunk full of luggage.

no constructions just three stops thats it.

i say on a flat windy day ur car can get best mpg at 70mpg cuz i feel tha the power curve is right around netural there.


but on really windy and hilly areas i say 80 is good....


but then again i heard of a guy get 50mpg in a ford tarus doing 45mph for a whole tank....

traveling in the conditions you mention at higher speed will drop your MPG.

Think about it. You have to spend energy to fight through the wind. This uses more fuel. Then on top of that, you are traveling at a higher speed. That also uses more fuel.

With regard to hills, traveling up them faster will usually result in more fuel burn as well.

[kmart64]

traveling in the conditions you mention at higher speed will drop your MPG.

Think about it. You have to spend energy to fight through the wind. This uses more fuel. Then on top of that, you are traveling at a higher speed. That also uses more fuel.

With regard to hills, traveling up them faster will usually result in more fuel burn as well.

I find that as in your previous post...the h22 gets its best gas mileage around 80 mph-85 mph...

[koolkoreanked]

45 mph in 5 gear cruising down hill. lol Naw for real tho. I have notice with the h22 the first trip to fl I averaged 80-85 before the head gasket blew... and got between 28 and 30 mpg. I guess 3800-4000 rpms is noting for a car made to go to 8k... Cause in my audi, granted its heavier by 200 lbs, only gets 26.9-28 depending on how many hills and all the other factors at the same speed. In the audi at 45 in 5 gear cruising on flat ground my instant mpg sits at 50+. I'm sure the prelude is the same way.

[Lil' Whitie]

traveling in the conditions you mention at higher speed will drop your MPG.

Think about it. You have to spend energy to fight through the wind. This uses more fuel. Then on top of that, you are traveling at a higher speed. That also uses more fuel.

With regard to hills, traveling up them faster will usually result in more fuel burn as well.

hmm... that would make sense.


so baskically if we can just keep our car at 60 mph that is like the best mpg?


k.. new question.... how slow can we go on flat ground normal conditions in 5th gear before our engines have to work HARDER inturn to burn more fuel?

[accordaffair]

I could get high 20's, low 30's in my 90 lx. I haven't been able to do that in my 93 ex. I blame the shorter gearing, and to some extent, the extra weight

[owequitit]

I find that as in your previous post...the h22 gets its best gas mileage around 80 mph-85 mph...

The odd thing is, so did the F22 I had.

[owequitit]

hmm... that would make sense.


so baskically if we can just keep our car at 60 mph that is like the best mpg?


k.. new question.... how slow can we go on flat ground normal conditions in 5th gear before our engines have to work HARDER inturn to burn more fuel?

You need to read my original post.

[owequitit]

I could get high 20's, low 30's in my 90 lx. I haven't been able to do that in my 93 ex. I blame the shorter gearing, and to some extent, the extra weight

I used to get like 23/27 when my car was stock. Just before I retired the F22, I was routinely getting just around 33/40. It made quite a difference, and I was surprised. But usually lower gearing does not help in that regard, although sometimes it can.

Now I usually run about 28/35 with the H, spinning at 3800RPM, so it doesn't seem to mind too much. I supposed if the gearing fits the powerband.

Oddly, our 06 V6 gets better MPG than the H22, while being similar in acceleration performance.