[Blown67]

Originally Posted by mbar

I'm running 0W40 / 5W40 all year round. You should not have any problems (in my opinion) especially in warmer Texas.
My Owners manual might be out of date, since it says to change rear diff fluid After your first track day.

The diff fluid thing was either before or after your first track day, I don't remember and my manual isn't with me. Can't remember if that was just a drain and fill to get rid of any metal or changing to a different weight altogether, I've got the ELSD in mine.

[Franko07]

https://www.redlineoil.com/product.aspx?pid=144&pcid=21

dexos 2

[MatthewAMEL]

Originally Posted by Blown67

The diff fluid thing was either before or after your first track day, I don't remember and my manual isn't with me. Can't remember if that was just a drain and fill to get rid of any metal or changing to a different weight altogether, I've got the ELSD in mine.

Diff fluid is after 1.5k miles before 1st driving event, then AFTER 1st driving event and then after each 24 hours of track time.

[jreagle56]

Found this 5w40 Dexos 2 at Amazon. Not familiar with the brand. Is it any good?
https://www.amazon.com/Amalie-Elixer...os+2+motor+oil

[Blown67]

Originally Posted by MatthewAMEL

Diff fluid is after 1.5k miles before 1st driving event, then AFTER 1st driving event and then after each 24 hours of track time.

There you go, that's it. My book is with the car which is not where I am. What about the brake fluid? Is it gonna hurt to leave the higher temp stuff in there for street driving? If not, I wonder why Chevy didn't just put it in from the start

[JeromeS13]

Originally Posted by Blown67

There you go, that's it. My book is with the car which is not where I am. What about the brake fluid? Is it gonna hurt to leave the higher temp stuff in there for street driving? If not, I wonder why Chevy didn't just put it in from the start

It won't hurt it, but does require more maintenance (flushing/replacing more often).

[mbar]

Originally Posted by jreagle56

Found this 5w40 Dexos 2 at Amazon. Not familiar with the brand. Is it any good?
https://www.amazon.com/Amalie-Elixer...os+2+motor+oil

Check Napaonline for Valvoline MST 5w40