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Old 11-02-2014, 01:20 AM
 
Location: Eastern Missouri
3,054 posts, read 5,036,539 times
Reputation: 1377

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Quote:
Originally Posted by outafocus View Post
I never owned a car with a bigger engine than the 225 slant 6 on my 1968 Dodge Dart. That would be 3.7 litres in today's terms. I thought it was a guzzler, always getting between 18-20 MPG. I traded it in for a VW Beetle that got 25-28 MPG. I traded that Beetle for my first brand new car, a 1978 VW Bus, and was shocked that it could only manage 20 MPG at best! I kept the bus only nine months, and traded it in on a new 1978 VW Rabbit when the 1979s were coming out. The Rabbit got 28-30 mpg. I have bought gas for as low as 18.9 cents a gallon, but I never thought wasting it was worthwhile. Now that gasoline is so expensive, I am glad I still drive vehicles that get great MPG. I will never again own a car with a bigger engine than a 4 cylinder.

Today's V8's are getting upwards of 30 mpg, and in some cases even as high as 33 mpg. Why on earth at that level from todays V8's would you want a traffic jam causing, accident creating slow 4 cyl. ?
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Old 11-02-2014, 01:22 AM
 
Location: Eastern Missouri
3,054 posts, read 5,036,539 times
Reputation: 1377
Quote:
Originally Posted by 73-79 ford fan View Post
I drive a 1978 Mercury Grand Marquis with a 460 based 514 cid engine and a 1975 Oldsmobile Ninety Eight with a 455 and a 1979 Ford F250 with a 460 and a 3.73 rear axle ratio. The Mercury with the 514 and a Quick Fuel carburetor seems to get the best fuel mileage of the three which is in the mid teens highway mileage.

Ever rebuild that 455, use flat top 400 Pontiac pistons so it has enough compression to start getting mpg and power. Nice combo selection on the Merc !
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Old 11-02-2014, 02:55 AM
 
Location: Louisville KY
3,982 posts, read 3,557,437 times
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If it gets over 10, I'm happy with it. A four cylinder is fine in a small car, a v6 pulling the same weight, with 80+ hp, would probably yield higher mpg's.
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Old 11-02-2014, 04:56 AM
 
Location: San Antonio
1,527 posts, read 2,869,242 times
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Quote:
Originally Posted by 12GO View Post
Today's V8's are getting upwards of 30 mpg, and in some cases even as high as 33 mpg. Why on earth at that level from todays V8's would you want a traffic jam causing, accident creating slow 4 cyl. ?
Neither four cylinder vehicles I own are slow. My vehicles do not cause traffic jams or cause accidents like stalled out Detroit vehicles do. I would NEVER own a V8. Most V8s are in Detroit 3 vehicles, and I swore off them forever in the 1990s. The V8s that Toyota and Nissan put in their way too big trucks are good reliable powerplants, but like all V8s, they are thirsty, too.
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Old 11-02-2014, 04:56 AM
 
12,120 posts, read 27,577,644 times
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CRs test of the 72 Impala with the 350 showed it got 8-17 in normal driving and 13 on a 300 mile trip

test of the 73 Caprice with 350 showed 8-16 in normal driving and 13 on the 300 mile trip. the 8-16 range averages out to 12--just what a previous poster said they got with a 73 Impala

by contrast a 73 Plymouth Fury with the 318 got 9-18 range and 14 on a 300 mile trip. do you consider this to be "significantly better" than the Impala/Caprice or is it just slightly better?
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Old 11-02-2014, 12:29 PM
 
Location: San Francisco Bay Area
11,444 posts, read 13,995,434 times
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My parents had a 1970 Pontiac GTO, when I was growing up. 9-11 miles per gallon. I think gas was 35-37 cents a gallon. I remember my mom filling up at the local Shell station and she gave the attendant a $5 bill and got change back!
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Old 11-02-2014, 02:02 PM
 
4,855 posts, read 2,049,262 times
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in terms of gas, the older cars actually used more - that 8-10 gallons was a lot, but when you consider the refinery technique of today, that same 8-10 gallons would today, produce 15-25 gallons of usable gas, so in retrospect, the older cars got the equal of 3-7 miles per gallon, based on what advanced refinery technique can provide, along with lighter vehicles and better fuel management systems.

We wasted 2-3 times the fuel due to poor ability to institute refinery process upgrades.
Some remember when the color of gas was Orange, that same Orange colored gas, if it could be re refined today, would probably make 2 or 3 or more gallons for every one Gallon of the Orange gas.
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Old 11-02-2014, 02:25 PM
 
Location: Northern Maine
9,525 posts, read 14,317,996 times
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I bought a new full size Dodge Van in 1975. It got 11 MPG. I disabled the automatic choke and mileage improved by 1.5 MPG. At 10,000 miles the bias ply tires were worn out. I replaced them with radials and improved the MPG by 1.5 MPG. At 12,000 miles the warranty ran out and I replaced the factory exhaust with dual exhausts and improved my mileage by another 1.5 MPG. That's an improvement of 4.5 miles per gallon from three simple things just about anybody could do. Sixteen MPG is a 39% improvement over the factory configuration. Each time the dealer was totally amazed that such things were possible.

By the way, when I went to dual exhausts I left the factory muffler in its original location and added a Scotty glass pack on the other side. It had a unique sound and people thought I had some kind of racing cam in there. Nope. It was a plain old Dodge 318 V-8 to begin with.
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Old 11-02-2014, 03:28 PM
 
8,874 posts, read 7,363,847 times
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Quote:
Originally Posted by 12GO View Post
Today's V8's are getting upwards of 30 mpg, and in some cases even as high as 33 mpg. Why on earth at that level from todays V8's would you want a traffic jam causing, accident creating slow 4 cyl. ?
Most midsize sedan 4 cylinder engines (base engine) don't have a turbo nor super charger. Their size is about 2.5L, about the size of the old GM Iron Duke engine. Today they approach 200 HP and 0-60 range of 6.5 to 7.5 seconds depending on model and transmission. Slower models are in the 8 second range which is where V6 sedans were a little more than 10 years ago. Basic engine compact sedans are slower, but most are in the area of 9 seconds 0-60.
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Old 11-02-2014, 05:37 PM
 
Location: Louisville KY
3,982 posts, read 3,557,437 times
Reputation: 3111
Quote:
Originally Posted by victimofGM View Post
Most midsize sedan 4 cylinder engines (base engine) don't have a turbo nor super charger. Their size is about 2.5L, about the size of the old GM Iron Duke engine. Today they approach 200 HP and 0-60 range of 6.5 to 7.5 seconds depending on model and transmission. Slower models are in the 8 second range which is where V6 sedans were a little more than 10 years ago. Basic engine compact sedans are slower, but most are in the area of 9 seconds 0-60.
Right, for a 2.0L my mothers neon is a beast.
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