What is your sujustion on putting pupple oil in my 2010 Lexus 450 h does it make the engine last longer.

Another good place would be to check some forums where people have same make and model you have for people who may have experience as well as dealer employees or mechanics who can comment with pros and cons

Read your manual.

I don't know about that. I usually take the service person's recommendation. I do like the idea of using synthetic oil.