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8805 messages,  Last post on Nov 27, 2009 at 11:25 AM

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What is this discussion about? Fuel System


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#8745 of 8805
Re: Still holding [andre1969] by lemko
Oct 13, 2009 (4:44 am)
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Replying to: andre1969 (Oct 13, 2009 4:36 am)

My Grand Marquis most definitely gets better highway fuel economy. Around town, it's a pig!
#8746 of 8805
Re: Still holding [lemko] by andre1969
Oct 13, 2009 (5:08 am)
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Replying to: lemko (Oct 13, 2009 4:44 am)

Oh yeah, my 5th Ave is horrible around town. I can actually get the fuel economy down to single digits without trying too hard. Of course, my short commute to work doesn't help, as the car barely gets a chance to fully warm up. And sometimes I'd start it up just to move it out of the garage if it was in the way, so that doesn't do much for economy.
 
Back in 2008, I had to drive the 5th Ave up for Spring Carlisle when the Intrepid died. It rained something fierce all the way home, and the tires on that car are, to put it nicely, "marginal". I was probably averaging 45-55 mph all the way home, probably never got above 60. Thankfully the rain was fierce enough to make everybody slow down, so I wasn't holding up traffic at those speeds. Anyway, on that trip home, I got 18.3 mpg. Yet this past weekend, running more like 65-75 mph, depending on traffic, and even hitting 80-85 a couple times, I still managed 18.
#8747 of 8805
Re: Still holding [andre1969] by fintail
Oct 13, 2009 (7:27 am)
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Replying to: andre1969 (Oct 13, 2009 5:08 am)

Wow, that makes me feel better about my car. I have to really try to get it below 14mpg or so - I'd have to hot-rod around all the time. If I drive like a normal person, 15-16 or so seems average.
 
I think gas here has fallen a dime or so in the past few weeks...I think I paid around $3.10 for Chevron premium.
#8748 of 8805
Re: Still holding [andre1969] by 210delray
Oct 13, 2009 (8:16 am)
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Replying to: andre1969 (Oct 13, 2009 5:08 am)

I think wet pavement actually lowers mpg. I would doubt in any case that your 5th Avenue would be more efficient at 65+ mph compared to 45-55 mph, all else being equal. For one thing, it only has a 3-speed auto, correct?
 
Plus, there would be tank-to-tank measuring error, which you can't do anything about, since you only take it on long trips a couple of times a year. Now if you want halfway across the country and back (probably not what you'd want to do with a 30-year-old car ), you'd have more accuracy after averaging several fill-ups.
#8749 of 8805
Re: Still holding [210delray] by andre1969
Oct 13, 2009 (9:09 am)
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Replying to: 210delray (Oct 13, 2009 8:16 am)

I would doubt in any case that your 5th Avenue would be more efficient at 65+ mph compared to 45-55 mph, all else being equal. For one thing, it only has a 3-speed auto, correct?
 
Yeah, just a 3-speed automatic, but it has a tall 2.45:1 axle ratio, so at mid-range speeds it's pretty quick to downshift to second, which is a 1.45:1 ratio (for a multiplication of ~3.55:1) At higher speeds it's torquey enough to just stay in 3rd.
 
Plus, there would be tank-to-tank measuring error, which you can't do anything about, since you only take it on long trips a couple of times a year.
 
I always try to top the car off, and as soon as the pump shuts off, I'll usually try to round up just a bit, to the next 5 or 10 cents. Still, I realize those pumps can vary when they shut off. I wonder how much it can vary from tank to tank? It has a 21 gallon tank. I wonder if it could vary by as much as a gallon, from fill up to fill up?
 
I've recorded over 20 mpg three times with the car. Got 22.5 on the day I bought the car, bringing it home from West Va. Got 21.9 in 2008 when I drove up to the Mopar Nats in Carlisle. And just this past summer, I got 21.4 doing that same trip. On those trips when I go directly out to Carlisle, the terrain is more level. This past weekend and the weekend before I went to Harrisburg, around the Baltimore Beltway and up I-83, and that route's a lot more hilly.
 
I've also tracked overall mpg for the car since I bought it back in October 2001. A somewhat depressing 11.5 mpg, overall.
#8750 of 8805
Re: Still holding [andre1969] by fezo
Oct 13, 2009 (11:21 am)
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Replying to: andre1969 (Oct 13, 2009 9:09 am)

We've had a touch of a bump upward here. The station that was $2.12 is up o $2.16.
#8751 of 8805
Re: Still holding [andre1969] by explorerx4
Oct 14, 2009 (3:13 pm)
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Replying to: andre1969 (Oct 13, 2009 9:09 am)

i know your commute is really short.
did you try to pump up the tires?
11.5 is worse than my kids get driving the explorer.
239 hp v8 4wd with 3.73 axle ratio and a 300 watt system with subwoofer.
the louder the music, the worse the mileage.
RUG is touch under 2.50.
#8752 of 8805
Weird by pf_flyer HOST
Oct 14, 2009 (5:12 pm)
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The station I usually buy at bumped up 2 cents to $2.47 which is what almost every other station in town was at. But several other stations dropped to $2.45 and one went down to $2.43
Screwy
#8753 of 8805
Gas prices around the USA by gagrice
Oct 16, 2009 (9:01 pm)
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I returned home yesterday after 5687 miles in my Sequoia. Average for trip 17.93 MPG. Average cost for RUG $2.47. Cheapest gas in Indiana, Kentucky & Missouri. Low price $2.17 in MO. Highest CA at $2.99. Cost about 14 cents per mile. Very pleasant comfortable drive. Glad to be home.
#8754 of 8805
BIG JUMP by oldfarmer50
Oct 17, 2009 (6:49 am)
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Gas at my local discount place jumped 17 cents in 4 days from $2.46 to $2.63 for RUG. What's up with that?
 
Oil was up around $78 bbl. yesterday. Are we going to have this speculator crap happen again? With everybody still out of work I don't think we can blame it on the SUVs anymore.
 
Maybe Soros needs a new boat.

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