I have a 95 Civic EX. I am definitely not a conservative driver as far as shifting goes. I often don't shift until 3 grand, and sometimes during spirited driving I can go as high as 4500 revs until I shift gears. My fuel tank holds 11.9 gallons of gas. My gas gauge isn't entirely accurate, as sometimes it will move UP. One time I lost a quarter tank of gas between stop lights, then regained it back within the next 20 minutes. It's more of a relative meter to me, but still is reliable. Anyway, I've used about a third of a tank of gas, or 4 gallons, and my trip odometer reads 105 miles. Roughly 26 mpg total. (My car fresh from the factory would get 28 city, 35 highway.) Now during this time I spent about 20 minutes doing over 70 mph in 4th gear on an endlessly long road, and pushed her up to 100 mph in 4th gear before backing off for fear of crashing (it was 1 am, and the road was wet and VERY foggy, to boot). My question is quite simple: what kind of fuel mileage should I expect at wide open throttle? Obviously I cannot drive around with the throttle pinned all the time, but has anybody driven long enough at WOT to make a general guess? I would be expecting maybe 10 to 15 mpg.

By the way my engine is a stock 1.6 L D16Z6 VTEC.
Thanks for the responses.

 

WOT fuel usage scales strongly with throttle opening. And per-mile consumption scales with speed. So your question is hard to answer, but your guess is probably close.

But it seems like you're really interested in calculating how your driving style affects fuel consumption. If that's the case you're using a very inaccurate method. Just measure how many miles you get on your next fill up. Reset your trip odometer every time you get gas, and write down the miles on the fillup receipt. Divide that by the gallons added on the receipt and you have a much more accurate estimate of consumption, especially if you average over a few trips to the pump.

But more to the point, take it from one who knows: stop driving like an idiot. Save your 100 mph excursions for a closed track. You want to risk your own life that's stupid, but it's your prerogative, but you share a public road with other people. Even at 1 am there could be a car with a child in it around the next corner.

 

Actually I do it that way. I divide the amount of fuel, in gallons, into the amount of miles traveled by the trip odometer. I did it this way because I haven't run out of gas yet, and I just wanted to do a quick calculation. 100 mph on the road I was on was definitely illegal, but in my defense, in the 25 or so miles we traveled on it (all straight) I didn't pass a single car, and maybe a handful of houses.

 

So is the calculation for peace of mind? to know that you still have fuel?(you mentioned your gauge not working)

I would get that problem fixed and you can tell at your next fill up how much mileage you are losing with the spirited driving you do. Like Gagnar said "you're using an inaccurate method"

 

No my fuel gauge works it's just sometimes a little unsteady.

 

Unless you're able to run WOT 100% of the time I don't see how you can POSSIBLY calculate your MPG. You would never be able to duplicate driving history to be able to do this. Or am I misunderstanding what you're asking?

I won't even mention the idiotic driving stunt.

 

Well in this case...

...very bad fuel mileage.

 

'nuff said.