lilgreek

i've got a 91 ls400.....250-400 miles/day......use 87 octane w/ no problems, sluggishness, etc......oil changes approx. every 2 weeks...

just made my '91 ls400 into a cab a few months ago. so far, so good... a couple of weeks ago, i noticed that temp gauge was staying just above the 1st line....never higher...swapped the thermostat w/ my newly acquired '90 ls400 parts car (rear ended.) to no avail.....anyone have any ideas??? thanks!!

p.s. rookie poster.......how do add pics here??

rookie poster here......140,000+ on my 1991 ls400.....but 27,000 miles in the last 3.5 months, since making it into cab....