[rickeolis]

210 for stop and go on a really hot day is just fine. I have been getting 240+ on our hot days, and my friend had to install an oil cooler on his to deal with it. I am going to have to get a cooler too, but have many other issues to deal with first. (Rusty panels, etc.)
You really don't want to go past 250 if you can avoid it. That is the rule found on this BBS and in aftermarket manuals I have read.