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post #1 of 5 (permalink) Old 04-16-01, 10:15 AM Thread Starter
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Join Date: Feb 2001
Location: SW Ohio
Posts: 930

Believe this one..... last week took Marq on a road trip. With 207k it pulled 30 mpg with the air on, and going 70-80. I did not think these cars could get that good of mileage. I was like NO WAY, I even checked my math 2x, looked at the gas pump 3x to make sure I had actually read it correctly. The trip was a ton of DOWN hill, but still I thought 25-27 would be the best I would see with the car.

70 Camaro SS // 87 Mustang GT Conv - 119k
93 Z71 - 264k // 01 P71 - 87k // 05 Dodge Magnum R/T - 122k
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post #2 of 5 (permalink) Old 04-28-01, 08:44 PM
Grand Marquis Member
Join Date: Apr 2001
Posts: 7
I think your odometer is broken! :) All seriousness aside, I got 25 MPG commuting at 70 MPH+ once but only after an oil change with some special lubricant added ... but 30? You must have been driving downhill with a strong tail wind while drafting a truck! :)
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post #3 of 5 (permalink) Old 04-29-01, 06:27 AM
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Join Date: Apr 2001
Location: Western NY
Posts: 129

My all time best MPG was like 18 on the highway... otherwise I get rouhgly 15 with moderate to semi-heavy driving... ( drive like 300 a week to school at 75 on the highway...)


1993 CV LX Silver with Silver Interior
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post #4 of 5 (permalink) Old 04-29-01, 07:29 AM
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Join Date: Feb 2001
Location: foxboro ma
Posts: 149
when you figure out how you got 30 mpg let us know. i would like to do what ever it is so i can get the same. it could realy help with the high prices of gas. if i can get the vic to get good mileage my wife will have to park her cady and drive the vic more.

82 f100
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post #5 of 5 (permalink) Old 05-08-01, 06:10 PM
Grand Marquis Member
Join Date: May 2001
Location: Norwood, OH
Posts: 15
I can attest to the 30mpg rating on the Marquis's. I regularly pull high 20's on highway trips in my '93 with 146K, I average 16-18mpg running around town all week.
I know I have 3.08 gears, and run steady....aka Cruise control assisted....speeds on the highway. Other than that, I don't really push too hard in normal driving.....easy starts and stops, that sort of thing. Oh yeah, and regular maintance.
The one quirk I have noticed, and I may be crazy here, but if I run the same brand of gas everytime my MPG will level off then drop slightly. If I vary fuels....a different brand each time....then the mileage stays up. I would say it's all in my head, but I am picky about my gas mileage and I reset my 2nd trip at every fill up, so I really notice a variance.

1993 Grand Marquis w/170,000+ miles and counting. Now it's time to make her FAST!!!

Current mods:
12" conical K&N filter, Custom side exit exhaust with X-pipe and Dynomax Super Turbo mufflers, replaced stock fan and clutch with PI electric fan and PSM fan controller, Aluminum PI driveshaft.
Body mods include a '95 Cobra rear spoiler, tinted windows, 17" Mustang Split 5-spoke rims w/ P255/50-17 BFG g-Froce TA radials, and a 14,000lb Auxillary Trans Cooler.
Interior: Custom A-pillar guage pod w/ Digital oil pressure and Trans. Temp. guages.
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