oil for 220,000miles 97 LS400?

[sandchell]

What oil should I use for my 97 LexusLS400 with over 200,000 miles ...driving in HOT weather always.... 

[billydpowell]

 when new, 5w30.... after 100k 99 LS400 213k, I now use 10w30...... I'm in Texas.

[LSPaul]

I run synthetic 10W-30 in my '94 (230k miles on it at present); I normally use Mobil 1 Extended (and 15k mile change intervals), but 5W-40 Delvac 1 was on sale a while back, and I'm running that at this moment in mine.

Paul