Originally Posted by WhizkidTN
Wow, makes me reconsider my recent purchases! I've used Castrol EDGE 0W-40 oil for a while with good results but wanted to see about using the more "approved" 5W-40 weight and just purchased it from Walmart (online) for $22.xx (same price as their 0W-40 oil). My OCI is ~4K miles with my Turbo Optima. I liked that according to the specs I read, it had better figures (and only a touch higher NOACK). It seemed like it was a "toughener" oil so now I'm doubting what I thought.
Comments??
For 5w40 try any other 229.5 oil like M1 Formula M, Motul 8100, or even Mercedes OEM. AAP/Carquest stores also stock Pentosin which is also an amazing oil.