Ken-- I also have an '89 automatic-- and your RPM's = are matching mine.  I also have a new transmission and engine-- = each just turning in 6,000 miles. 

My mileage has been similar 17.5 during the break in = period, but with ECU/ plugs and air filter in hand, I'm looking forward = to some improvement.

I've made two 900 mile trips already  (in = addition to a daily 40 mile commute) and find that I keep her in the = neighborhood of 65/70 mph-- she appears happy and far enough into the = power band to satisfy me without pushing it. 

Date:    Sat, 14 Oct 2000 23:51:46 = EDT
From:    Ken Hartz = <ThreeHartz@AOL.COM>
Subject: Safe RPM's

I have a question as to what my RPM's should be at = speed.  I saw a post
earlier where someone said they did 65 mph at 3400 = rpm.  I have an 89GL
automatic, with alloy wheels, Michelin All Season = RainForce 205-70/14 tires
(came with the vehicle.)  The engine is turning = approximately 3600 rpms at 60
mph, approximately 4K at 70 mph.  This puts it = on the upper limit of the
"green" on the tach.  Is this normal = for an automatic?  I usually drive
between 65 and 75 and get 17-18 miles per gal.  = I'd like to drop the rpms
(longer engine life), but hate paying $$$ for larger = rims, etc.
TIA for any responses.
Ken Hartz