25MPG w/2000 Mustang

[2000mustang fan]

I just go 25MPG this tank with 259Miles and only 10.34Gals used. I was surprised because I still did some aggressive driving and it is still going up. Can't wait to see this tank once I don't aggressively drive and see if I can get to 26MPG, keeping my new driving habits. I think I can easily get to 30MPG soon. In about 6months I am going to swap out the Auto for a manual so I can acheive even greater fuel economy. I still have no aeromods but I have written my MPG on my side windows. I am getting a tune-up when I can fit it into my schedule, that should give me another increase.

[whokilledthejams]

Nice! See? Sensible driving goes a long way. It's the best modification you can make, really.

[xbUser]

Congratulation!! It is a great step from 20 to 25!! (25% improvement) 30mpg is a good goal. Keep going!!!

[suspectnumber961]

Guy manages 45 mpg with an 1985 Ford T-Bird 5.0L V8....

Article:Truth About Acetone and Ethanol - PESWiki

[webshowpro]

I've been getting over 30 MPG in my Corvette, no mods, just driving habit changes. I do have a manual transmission which I thinks helps the numbers a lot.

[90crxHF]

25mpg in a mustang is normal, so is 30mpg in a vette. These are not abnormal numbers, what I think is weird is why don't the smaller 4 cylinders get double this with the same driving habits. My 4.6L stang (that's setup for drag racing) can easily get 25 mpg, why doesn't my 1.6L get 50+mpg easy?? I know you guys will say they do, but that's not keeping up with traffic and of course driving extremely easy.

Just something I've always pondered and I have a few theories as to why the smaller engines can't do this...

[comptiger5000]

The smaller engines don't get better mileage in normal driving patters due to being underpowered. I've compared my Jeep with a 5.9L V8 to another with a 4.0L I6. I drove the 4.0 for about a month in my normal driving pattern. Since getting mine with the 5.9, and adjusting my driving habits to the higher powered, but very similar vehicle, I am getting within 0.2 - 0.3 mpg of the 4.0 in my normal pattern of short trips and city driving. My engine has 2 more cylinders and almost 50% more displacement. The Jeeps are very similar in weight. My tires are about an inch shorter (225/70/16 vs 245/70/16), axle gearing is the same (3.73). Trans gearing is slightly different. Mine is (1st - 2.45, 2nd - 1.45, 3rd - 1.00, 4th - 0.69). The 4.0 is (1st - 2.74, 2nd - 1.54, 3rd - 1.00, 4th - 0.69).

The bigger engine allows me to gain speed MUCH faster while keeping the engine in its efficiency band. The only problem is, in heavy downtown traffic, everyone else picks up too slow in their little 4 cylinder cars. Optimal MPG for me comes with letting the auto shift at 2100 - 2200, which allows moderate throttle. When stuck in heavy city traffic, I've seen it shift as low as 1400 rpm picking up from a stop on flat ground. At that point, I'm on the gas pedal so lightly, that I can't press it any less without coasting.

[Mustang Dave]

I got 24.98 with my 2007 Mustang once. That was the worst I ever got. I ran it in the "barn" a couple of times during the Winter of '07-'08 to charge the battery - at 0MPG.

[Christ]

Originally Posted by suspectnumber961

Guy manages 45 mpg with an 1985 Ford T-Bird 5.0L V8....

Article:Truth About Acetone and Ethanol - PESWiki

LOL @ PESWiki

Originally Posted by Article:Truth About Acetone and Ethanol - PESWiki

Conspiracy against use of Acetone? July, 2009

The use of gasoline with 10% Ethanol, known as E-10, has become so common in the U.S., that many states now have NO PURE GASOLINE available at all. It is now known that E-10, if acetone is added, will give WORSE mileage than factory. I was incorrect in that Ethanol evaporates anywhere near as fast as acetone. As well that Ethanol can create the same effect as Acetone. It is interesting to note that the nation wide switch to E-10 began immediately following the public statement on July 15, 2008 by the chairman of the Federal Reserve, that high gas prices were driving down consumption. This timing also coincides with my conversation at the yahoo group pes_acetone and with the local media about having achieved 45mpg hwy. from a V8 full size car, with acetone additive. Sterling Allan had been asking me to write an article, here, on this technology. The timing of the date I wrote this article, above, matches within 4 days of the action of the Fed, on July 15, 2008. My point being that the switch to E-10 prevents the use of acetone to REDUCE CONSUMPTION. So here we are a year after I wrote this article, with CONSUMPTION and PROFIT for those who benefit, very much to their liking. Use acetone now, in E-10, and your consumption will increase, not decrease. Pretty good trick. And let us not forget that the use of GRAINS to make the Ethanol has caused the prices of food to increase. --Behindbarsbimbo 10:11, 12 July 2009 (PDT)

ROFL.

Wash the gas, then add acetone, and see if you still get better economy. It's not too difficult to get rid of Ethanol in gasoline.

[90crxHF]

Originally Posted by comptiger5000

The smaller engines don't get better mileage in normal driving patters due to being underpowered. I've compared my Jeep with a 5.9L V8 to another with a 4.0L I6. I drove the 4.0 for about a month in my normal driving pattern. Since getting mine with the 5.9, and adjusting my driving habits to the higher powered, but very similar vehicle, I am getting within 0.2 - 0.3 mpg of the 4.0 in my normal pattern of short trips and city driving. My engine has 2 more cylinders and almost 50% more displacement. The Jeeps are very similar in weight. My tires are about an inch shorter (225/70/16 vs 245/70/16), axle gearing is the same (3.73). Trans gearing is slightly different. Mine is (1st - 2.45, 2nd - 1.45, 3rd - 1.00, 4th - 0.69). The 4.0 is (1st - 2.74, 2nd - 1.54, 3rd - 1.00, 4th - 0.69).

The bigger engine allows me to gain speed MUCH faster while keeping the engine in its efficiency band. The only problem is, in heavy downtown traffic, everyone else picks up too slow in their little 4 cylinder cars. Optimal MPG for me comes with letting the auto shift at 2100 - 2200, which allows moderate throttle. When stuck in heavy city traffic, I've seen it shift as low as 1400 rpm picking up from a stop on flat ground. At that point, I'm on the gas pedal so lightly, that I can't press it any less without coasting.

I do understand what you're saying here, and I'll to it with this...

I think there is a fairly specific power to weight ratio that car's should be designed after. Most of you guys in these V8's are getting pretty gas mileage, due to the power to weight ratio causing the engine to not be under heavy loads, because these engines have low end torque.

Now, for a 4 cylinder powered car to theoretically get twice the gas mileage, the power to weight ratio's will need to be similar. The very second the engine is struggling, FE goes out the window. However, even in a large V8, most V8's these days are reaching very high effeciency levels.... I mean, I can go get a 360 Cube motor that makes over it's displacement now, stock?? Wow, what an efficient engine, or is it over efficient??

Also, there's a certain point where an engine will be over efficient and you've gone past perfect efficiency. And it takes more fuel than it did before when it had "less" power.