Lexus/Toyota V8 engine is very easy on oil, any 5W30 synthetic on sale will do once a year oil change with Purolator Pure 1 oil filter with your mileage, I think you can use PL20195.
'94 LS400
'00 E430
'04 S2000
"Consumerism has accustomed us to waste. But throwing food away is like stealing it from the poor and hungry" Pop Francis