Not sure exactly what your question is...I put over 250K miles on my Samurai, a fair amount of that hard core rock crawling. My son had 180K miles on his. I found they liked to run at around 4000 RPM for best power and cruising. I seldom revved it over 4500. Hope that helps.
try a tach
640 rpms
cars idol speed in 640 rpms
depends on RPMs
Advertised Horsepower is : 165 HP @ 3800 RPMs. In 49 states.
I believe it is listed as 170 HP at 3300 RPMs. Peak torque is 338 ft/lbs @ 1400 RPMs. Here is the link: http://www.forgottendiesels.com/6.9_ford.html Mad Dog
It sets the transmission shift points a little higher in RPMs, providing a little better acceleration. With the AT button off, you're in economy mode.
about 12, 13,000 RPMS.
lower rpms use less gas higher rpms have more power
If you have an engine that idles at 6000 rpms, you need to have it checked - immediately. Around 750 rpms would be normal.
maybe your rpms gauge is broken.get it looked at by a professional
Most cars are anywhere between 750-800 rpms