Is This Mileage OK?

[Blankster]

From Cedar Point Ohio to Chicago 95 degrees A/C on with 4 people going about 80 most of the time. The MPG readout showed 20.0

[rogue]

The best mileage I've ever seen is 21.4mpg at 70mph with cruise control the entire time. On a road trip to Arizona last week from Los Angeles, I got 19.2 with the AC on full at about 90mph most of the time.

You're on par with the rest of us

[COSHOOTER]

Not trying to be rude or anything, but who cares?????? If you want a car for mileage, go buy a 4 cylinder import. You own a HEMI V8 ...as Dr. Phil would put it "it ain't about the mileage!!!!"

Just my $0.02,

Shooter

[arnoldw]

Originally Posted by COSHOOTER

Not trying to be rude or anything, but who cares?????? If you want a car for mileage, go buy a 4 cylinder import. You own a HEMI V8 ...as Dr. Phil would put it "it ain't about the mileage!!!!"

Just my $0.02,

Shooter

So...why does the HEMI run on 4 cylinders then

[Dutch]

Originally Posted by rogue

The best mileage I've ever seen is 21.4mpg at 70mph with cruise control the entire time. On a road trip to Arizona last week from Los Angeles, I got 19.2 with the AC on full at about 90mph most of the time.

You're on par with the rest of us

It astounds me that my 40-year-old Chrysler with a big block V8 and four barrel carb gets better mileage on the highway than a new 300C with MDS. Just amazing. It gets 22-23 mpg at 70 mph, no cruise control, no AC (windows down or windows and top down).

I have no idea how that is possible. My car even weighs a lot more.

[jaydee]

are the tyres the same width as the current chrysler 300Cs? Maybe its the rolling friction that accounts for the diff?

[Model 57]

Dutch, your Newport doesn't have any of the smog control crap on it. It was built when they did things the old-fashioned way; hot spark, high compression, nice advanced spark.
Emissions consisted of a PCV Valve.

[moddog]

I had a 1966 300 with a 383 4 barrel carb 727 trans. it only got 8 miles to the gallon . And it was new had it for three years trade it in for a 70 Challenger. So it is hard for me to believe that kind of mileage you say you are getting with a 40 year old car.

[arnoldw]

Hey Dutch, check this out! I owned it about 20 years ago. Don't think it ever got more than 17mpg (premium) if I was lucky. Also about 2 seconds slower in the 1/4.

[Dutch]

Wow that's a nice 300!

moddog, my Newport has some key benefits for mileage your 300 didn't have. Your 300 had a 3.23 rear end and (if it was stock) a Carter AFB carb. My Newport isn't stock - it's a factory 2-bbl engine, rebuilt with a 204/214 cam, and a Carter Thermoquad carb. It also has a 2.76 rear end. The spreadbore carb makes a huge difference in gas mileage because the primaries are so tiny.

I have used a variety of cheap tires on it, all of them 215/75/14 whitewalls up until last year when I put 15" Cragar wheels on it.

BTW if your car only got 8 mpg something was wrong with it. Or, maybe you had a 440. I don't think I've ever gotten under 11 with mine (except the one tank where I got 6, but I wasn't exactly driving normally for that one).

I also don't think I mentioned that the car gets 12-13 around town, so it only gets decent mileage on the highway. I'm certainly not saying it always gets 23 mpg.