[Radiation Joe]

Originally Posted by sensi09

And an older article, but even though redline makes a 10W60, they don't necessary recommend it over their 5w30. (The s54 is used as the example here)

http://www.redlineoil.com/news_article.aspx?id=13

+1 Thanks for the link.

My logic for the lighter weight oil is consistent with the Redline article. Loss of economy and power due to too heavy an oil recommended compared to the intended use. Also, Redline oils are much more stable at temperatures approaching 300 degrees (that our motors see during track days) than the Castrol TWS.