Originally Posted by gsxr

Yes - 90°C is normal. Actually anything between 80-95°C is absolutely, totally, perfectly, normal. Between 95-105°C, that's still fine if it's very warm outside and you have the AC on, or if you are climbing a long steep grade. BUT.... above 110°C, unless you're in Death valley, something isn't right.

There's no need to try to achieve 80-85°C all the time and on some cars, you never will. My 84 was usually 85-90°C, my '87 stays at 90-95°C year round, and my new 93 has been right at 90°C all winter (haven't driven it in summer yet.)

If you're not using Mercedes or Zerex G-05 antifreeze, I'd strongly recommend it. Read this link (2MB PDF file) for more info. I use one gallon of a/f, and add one bottle of Water Wetter.