Today's V8's (all engines in general) are much more efficient then those of the past. Try to get mid 20's or better MPG out of a 1960's - early 70's Corvette, V8 Camaro or Mustang like you can in today's models, it's not gonna happen. You'll be lucky if you get high-teen's or even 20 mpg.
I was waiting for someone to comment on that topic
It isn't efficiency that has brought us increased MPG's in modern day V-8's, it's gearing, more specifically, overdrive transmissions. Install an OD transmission in a 60's car with a stock engine and a proper tune, and you'll get the same, if not better, MPG's.
Better? Yup.
Why?
Because EFI engines are tuned to burn a strict 14.7:1 fuel ratio during cruising speeds. Get any leaner than that and NOX starts to rise. On the other hand, we didn't care about NOX back in the day, so carbed engines ran as lean as 17:1 during part throttle cruising speeds, hence better MPG's.
What?! So you're saying EFI engines are dumping extra fuel into the cylinders and out the exhaust (and your pocket book) just to lower NOX? Uh-huh
Considering the fact that older cars generally weigh a ton, and couple that with the fact that their aerodynamics are worse than a brick, it really is impressive what they can pull off MPG wise with an OD trans and carefully selected differential gears.
Back in the late 1980's when I became interested my grandfathers 1959 Pontiac, he used to rave how it got 20 MPG's at 65 MPH with a carload of kids and gear. What? A 4,300 pound wagon with a big ass gas guzzling 389 w/ a 4 barrel carb getting 20 MPG? Riiiiiiight.
It wasn't until years later that I found out it's indeed true, even with today’s crappy gas. Why? Gearing. Pontiacs (as well as Cadillacs and Oldsmobiles of the time) had 4 speed auto transmissions with an insane 3.96 first gear. Hell, the 2.55 second gear was steeper than first gear on any other auto trans or manual transmission at that time. But they were also equipped with rear end gears as low as 2.56. This combo gave you more than enough power to get moving in the lower gears, but the engine was only turning 2000 RPM’s on the highway. I know a guy with a '59 Bonneville who removed the original 3.08 gears and installed 2.56 gears. He gets slightly more than 25 MPG on the highway in that 4,500 beast and can light up both tires at a standstill with a Safe-T-Track (posi) rear end!
Why do you need to use SO much water when washing clothes
Because my clothes get more than office dust on 'em

Remember, WATER is the main ingredient for getting clothes clean. Dump a bunch of soap on clothes and nothing happens unitl you add water. The more water there is (with the proper amount of soap, or course) the more dirt it can quickly remove and keep suspended from re-depositing.
Why do you need to use SO much water when washingdishes
Because I enjoy my dishes being cleaned very well and put away almost within the hour

Does it really make any sense using a cup of water in the dishwasher and throwing it around a bunch of dirty dishes for 45 minutes to an hour? I prefer to use ample amounts of water and have it changed out often....just like my KDS-19 does.
And what are you flushing down the toilet that 1.6 gallons won't handle? Are you one of those that uses a 1/2 a roll of toilet paper each time you use the toilet?
LOL! I don't use much TP, but I do have a high fiber diet
My main issue with them is that 1.6's plug up quickly with mineral deposits due to our hard water. I get about 4-5 years before they're plugged up to the point that they refuse to flush without wanting to overflow. Funny, but the original 5 GPF American Standard toilet from 1970 hasn't had that issue yet

It replaced a 1.6 toilet upstairs and the pink '54 took the place of the '70 downstairs. Also, when the 1.6's are working correctly, I still have to hold the handle down, every time, before clean water emerges from the bowl. Not so with the guzzlers. Just flush and walk away. Instant clean water.
Here's a quote from a person in the water/wastewater field speaking about 1.6 GPF toilets:
The problem is they use so little water that the solids don't flow in the pipes properly. Water is the carrier for human waste but there's grease and other materials that go in there that stick to the inner walls of the pipe. This creates a need to flush sewers more often which uses a lot of water. On a private residence, they tend to plug up septic fields.
I guess you can say that I feel like I'm doing my part in keeping sewer lines from the street and beyond just a little bit cleaner

But I can't lie. It's very comforting to know I can pull this off, if needed.
<object width="480" height="385"><param name="movie" value="
"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="
" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object>