Hey Cal!
Last Monday I posted a similar question regarding the air pressure in the
tires. Apparently people are interested in only certain types of performance
as I haven't received any replies either.
I noticed a similar improvement with my tonneau cover (also Extang) on both
the 3.9L and 4.7L. It's the same one, I just moved it over. There have been
reports that the tonneau provides little to no improvement in mileage. All I
can say is I wish they would pay my gas bill!
The only mod's I have on the 3.9L are the double platinum version of the
3923. I'm not sure which plug to go to with the 4.7L yet. I added Mobil-1 to
the 4.7L with the tonneau and went from 16.5-19.5mpg traveling 200miles (80%
hwy @ 73mph) which I was very pleased with!
I'm going to have to conduct an experiment with the air pressure to see if
that impacts the mileage. I'm more concerned with even tire wear, but there
is no good way to check that one.
Good luck with the rest of the testing!
Sean
'92 RC Sport 3.9L 5spd - 250,000mi!
'01 CC SLT+ 4.7L 5spd 3.92 LSD Mobil-1!
-----Original Message-----
From: Cal Hyer [mailto:clhyer@hom.net]
Sent: Sunday, February 11, 2001 8:48 PM
To: dakota-truck@buffnet.net
Subject: DML: Re: V-6 MPG Tests 1 & 2
Test Results, to follow up my earlier message.
Test 1 - Base vehicle. Washed Friday night and conducted this test Saturday
afternoon. Temperature was about 65.
A. 65 miles of interstate at 70 mph. Result was 19.81 mpg
B. 51 miles of State hiway at 55 mph. Result was 21.75 mpg
C. 1/4 mile times** 18.10, 18.34, 18.53
Test 2 - With soft tonneau. Tested Friday evening after the wash,
temperature was 70.
A. 65 miles of interstate at 70 mph. Result was 22.72 mpg
B. 49 miles of State hiway at 55 mph. Result was 22.02
C. 1/4 mile times** 18.00, 18.32, 17.91
It appears from my tests that the soft tonneau does contribute significantly
to mpg on the road. Add to this the utility of the soft tonneau and I
really like it. I also note that this is above the window sticker that
advised "16 city & 21 highway".
** Please read my earlier post regarding the accuracy of these times.
I hope to post some additional results next week after some additional mods.
(I hope you are listening, Tony!)
Cal Hyer
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:59:13 EDT