20 mpg

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Jun 18, 2003 | 08:10 AM

1BigExpy

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Joined: May 2003

Posts: 273

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From: San Angelo, TX

20 mpg

I bought my 2000 4.6L about a month ago and I've averaged about 15 around town. Last weekend I filled up the tank and for the first time did some highway driving and ended up with 20.1 mpg. I've been so excited about it I've had to tell everyone. In the past I had two different Jeep Grand Cherokee's that were half the size and didn't get this good of mileage. Spent about 30 minutes stuck in traffic so it might even get better. This weekend I'm heading from CA to TX so it will be interesting to see what my mileage is. You other 4.6 guys getting this kind of highway mileage?

Jun 18, 2003 | 09:14 AM

KR1

Senior User

Joined: May 2003

Posts: 128

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From: Northern Alabama

20 mpg

My 99 EXP EB (2WD) 4.6L gets about 20 MPG

on the highway and 13-15 in town...

Time for the 60K tune-up (new plugs) and other stuff...

Any wise words before i tackle this project

PS FTE is awesome

Jun 19, 2003 | 10:08 AM

Track Rat

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Joined: Jun 2003

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20 mpg

Any one ever get close to 20 mpg highway with a 5.4?

What kind of highway mileage can be expected w/ a 5.4?

How about while highway towing approx 4,500 lbs with a 5.4?

Jun 19, 2003 | 11:02 AM

hokiebob

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Joined: Jan 2003

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20 mpg

With my 5.4L, my wife can get 18-19 highway driving around 65 or 70, but when I drive at speeds 75-85, it only gets low 16's.

Jun 19, 2003 | 12:17 PM

Track Rat

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Joined: Jun 2003

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20 mpg

That's encouraging! Thanks!

Jun 19, 2003 | 01:33 PM

marlinmike

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Joined: May 2003

Posts: 48

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20 mpg

I averaged 18.5 with mountianist roads as well as when I have a slight heavy foot and going 75.

I have seen 19mpg and change when I slow down to 70 or less.

Jun 19, 2003 | 02:47 PM

tsdrallyer

Elder User

Joined: Nov 2002

Posts: 736

Likes: 1

From: Texas, USA

20 mpg

TrackRat said:

What kind of highway mileage can be expected w/ a 5.4?

I've always gotten 16 mpg at 70mph, with my '97 4x4, 3.73 diff, and extra equipment sticking out all over it. All the added on filter, catback, etc. didn't change a thing.

How about while highway towing approx 4,500 lbs with a 5.4?

I tow an 8' x 26' TT weighing in at 5020 lbs. At 75 mph on the flat I get 9 mpg. 65 mph I get 10 mpg. Best I can get is 12 mpg at 55 mph. The lowest I ever got was 8 mpg going all day into a 40 mph headwind at 60 mph, an effective 100 mph wind speed.