I was reading a few post and noticed a TSB from toyota for the use of 0w20 on 2AZ-FE engines, that all toyotas with this engine from this point will be using this oil. I am currently under warrenty through toyota until 75,000 miles. My manual calls for 5w30, but my question is will running 0w20 perform better in my camry. I know that it will for winter applications. But in general is this a better motor oil, especially if it is synthetic. Group IV or V oils. Is this a better oil in general.I am not sure, it good to have some knowledge on this matter and I have plenty of 5w30 in PP, but I know that it is Group III. Will 0w20 or 5w20 make a difference in the way my car runs, fuel MPG, ect... Any thoughts would be appreciated.