How Many Miles to a Tank of Diesel.

Cowcatcher · **Posted:** Mon Jan 01, 2007 4:54 pm

Many of us are seeing a 2% fast speedometer reading and a 6>7% low odometer reading with OEM tires. A few others have seen dramatically different readings both high and low.

jinstall · **Posted:** Tue Jan 02, 2007 7:05 am

I get an average of 305 miles per tank. I also drive much faster than pretty much anyone here. I have NEVER been passed by a KJ or GC on the autobahn. I have only seen one SRT8 and it was on the dragstrip.

CRuD Bucket · **Posted:** Tue Jan 02, 2007 9:44 am

My odometer is way off. See my old post. Hope to check it with a GPS one of these days.
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?t=11605&start=0

zerotact · **Joined:** Tue Apr 25, 2006 10:37 pm **Posts:** 6

well, I usually cruise 75-85 just curiuous who else does this and what mileage they get?

sbohner · **Posted:** Wed Jan 17, 2007 11:49 pm

I cruise on long trips between 75-80 (dropping down to 70 in more dense traffic) and get about 450 miles with 17 gallons. This seems fairly consistent (within a mile or two MPG) even in more mountainous areas.

I have noticed that my GPS consistently shows my speed being 2-3 miles lower than what shows on my speedometer. Is this true for anyone else? I wonder if there is more miles stacking up on the odometer since the speed is reading higher than actual?

Zonie · **Posted:** Thu Jan 18, 2007 1:50 am

My speedometer is 3-4 MPH lower than my actual speed according to my GPS. New tires didn't change a thing.

KenJennings · **Posted:** Thu Jan 18, 2007 2:10 am

While we're on the subject of using GPS to verify odometer and spedometer accuracy... I figured out my odometer is reporting fewer miles than reality and I need to get a GPS. Anyone have recommendations for a good GPS?

sbohner · **Posted:** Thu Jan 18, 2007 9:44 am

I've been very happy with my Garmin Nuvi 350. It has a lot of useful features including stating the street/road names prior to turns rather than just "turn right in 500 feet", and being able to walk around with it in the city since it is small enough for my shirt pocket. I noticed that the prices are coming down substantially on all GPSs since more potent models are coming out.

Again, I am very satisfied with my Garmin.

oldnavy · **Posted:** Thu Jan 18, 2007 10:41 am

Did a road trip yesterday and just using the ODO on the Jeep it checked in with 25 MPG's which is not bad since the CC was locked in at 76 mph and there were several ocassions where I hit 85 to 90 while passing a semi. If I remember correctly that was 2400 rpm. I just find it so unreal, even though I know the science as to why, that the difference in 10 mph of 65 mph vs 75 mph is 6 mpg to 8 mpg difference in fuel ecomony depending on fuel, weather and other factors. We normally drive the Jeep about 65 to 70 mph and average about 28 to 32 mpg when maintaining those speeds, I did average 32 mpg on a trip to MI last spring will driving only 65 to 67 mph. Hey the return trip I burned up the highway with CC set at 78 mph for most of the trip and only averaged about 23/24 mpg for the return trip. I remember it really supprised me what the difference in mpg's was with the speed factor for the return trip.

How Many Miles to a Tank of Diesel.

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