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Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036317 03/08/19 03:46 PM
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Chris142 Offline
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73 was a bad year for all manufacturerrers. Low compression,retarded cam timing and ignition timing we're terrible for gas milage and power. The 400 was likely Ford's most underpowered engine of all time.

The 2.75 gear ratio is just icing on the low performance cake.

BTW that car will have the plastic cam gear teeth that are ready to fall off.

Figure 8 mpg in town. 11-13 hwy. Do some tuning and you may be able to muster 15 mpg hwy under ideal conditions.

A big block would be a better choice for it. Same mpg but enough power to pass

Last edited by Chris142; 03/08/19 03:47 PM.

02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
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Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Gas mileage of a 1973 Ford LTD? [Re: MrMoody] #5036326 03/08/19 03:56 PM
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Linctex Offline
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Originally Posted by MrMoody
Assuming the 5 is really an S, it would be a 400 2-bbl. Expect around 10-12 mpg avg if it's running good and hasn't been modified. Might do 15 on the highway if you keep the speed down.


THIS ^^

Without Overdrive trans, and PROPERLY tuned (for mileage, not for emissions) you can get 15 if you stay under 60 mph.

Early 70's cars were tuned HORRIBLY, sacrificing mileage to make emissions specs instead.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036327 03/08/19 03:57 PM
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csandste Offline
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Horrible decade for cars. Think I was driving a 72 Renault R16 that year. Don't even think that got good mileage.


2017 Kia Soul Plus-- VWB 5w30+ a bit of Harvest King syn 5w30-- 70,000 miles
Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036331 03/08/19 03:59 PM
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dishdude Offline
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That's a Sunday driver that you put 2k miles on a year because it's cool. Who cares if it gets 8 MPG.


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Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036336 03/08/19 04:03 PM
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JLTD Offline
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Got to keep your foot out of it to get anything reasonable. I couldn't find a chart for 1973, fueleconomy.gov only goes back to....'74.

But I CAN tell you that my brother had a 1971 Chrysler 300 with the 440...if he got on it, he'd get get less than 7. But a friend of his (who does NOT have a lead foot) got 20mpg on a long trip to Florida.

YMMV.


I use the overseas manual to choose my viscosity.


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His: 2015 4Runner 60k, SS 5w20/Amsoil

Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036343 03/08/19 04:06 PM
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Kestas Offline
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I still have the records for our 72 Ford LTD 350W. We averaged 12 mpg during our family trip out West. Otherwise, we'd get 10-13 mpg.

Re: Gas mileage of a 1973 Ford LTD? [Re: dishdude] #5036346 03/08/19 04:08 PM
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addyguy Offline
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Originally Posted by dishdude
That's a Sunday driver that you put 2k miles on a year because it's cool. Who cares if it gets 8 MPG.


This 100%. Who cares about mileage - that is a beautiful, old, nice-weather cruiser for outdoor car shows, etc...


2010 Kia Soul 2U - 2.0L I-4, auto; 149k miles.
Castrol Edge (black bottle) 5W-30; Fram TG 9688.

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Re: Gas mileage of a 1973 Ford LTD? [Re: dishdude] #5036375 03/08/19 04:33 PM
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02SE Offline
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Originally Posted by dishdude
That's a Sunday driver that you put 2k miles on a year because it's cool. Who cares if it gets 8 MPG.


The OP who started this thread to ask the question.

Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036380 03/08/19 04:35 PM
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ARCOgraphite Offline
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That green monster is Just in time for St. Paddy's Day!

I had a bronze 74 with a 429 interceptor. Ex Police Chief car. Certified speedo. 700 bucks. Engine Ate valve seals and they got jammed in the oil pump which sheared the roll pin on the dist gear.

Run away !


2019 VW Jetta S 6MT OCI#2 7378mi-MOTUL Specific VW508.00+VW Service Filter; '17 Subaru Crosstrek CVT OC#8 60864mi-Subaru Idemitsu 0W20 + SOA Filter
Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036403 03/08/19 04:53 PM
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spk2000 Offline
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Very cool car!! Low miles but this car will require much attention compared to modern car. Spark plugs, distributor car, rotor, timing, carb adjustments and more. All fairly easy to work on and lots of room to get to everything. If you don't know likely youtube video will help.


96 Grand Marquis 203,000 mi
01 Sable LS Wagon 163,000 mi
02 Montero 191,000 mi
03 Sable LS Sedan 73,000 mi
Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036419 03/08/19 05:05 PM
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My father-in-law had a nice condition cream yellow '76 LTD with a 460. We live an hours drive from my in-laws, and used the LTD once to get home when our car was at the dealer for repair. We used 3/4 of a tank for two hours driving. A big gas tank, so lots of $ at the time to refill it. I was surprised at just how thirsty it was..


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Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036444 03/08/19 05:27 PM
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gman2304 Offline
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Gas was around 35 cents a gallon in 73. During the 74 oil embargo it went to about 55 cents a gallon. People went crazy and gas lines stretched for blocks. I had just bought a new 72 Toyota Corolla 1.6 L 4 speed so I was golden for a few years.

Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036467 03/08/19 05:45 PM
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ArtDecoWorld Offline OP
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Appreciate all the responses thus far. Yeah, I would have guessed around 10 MPG give or take.

It wouldn't be a daily, just a fun car. I do have a 1969 Valiant (Slant 6, no options), solid as all get out. Did a 125 mile trip recently. It's easy to work on, there's almost room to get in the engine bay and stand next to the engine. I do basic work, tune ups, etc myself. This LTD seems like a more upscale car from the time.

Chances are it'll get bid up more than I would want to pay anyway. I've been to this auction place before, and cosmetically nice older stuff tends to get attention. Not even sure I'll attend. I do dig the green color. It's got the look.

Last edited by ArtDecoWorld; 03/08/19 05:47 PM.
Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036537 03/08/19 06:36 PM
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My first car was a 1975 Mercury Cougar XR7 with a 351W. It got 11 MPG. My Grandmother had a 1974 Ford Elite with a 400M and it got 10 MPG. Both were 2bbl carbs. If you get it, make sure the brakes are top notch, as these were horribly under braked for the weight of the cars are almost dangerous by modern standards.


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Re: Gas mileage of a 1973 Ford LTD? [Re: ArtDecoWorld] #5036564 03/08/19 06:55 PM
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As it sits, I would be happy to get 8mpg in the city, 12 on the highway. How are you planning on using this car? I love these old boats.

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