My dad was a sales distributor, and we ran it in everything for years. It's a very good oil with high moly count. It started to get too costly with the price of high shipping. His cost was around $6/qt -- which is high for a "blend". If he picks it up in person, it's $5-something/qt. He ran it for well over 100k mi in his 2.7 Intrepid. No sludging whatsoever.