2002 Chevrolet Monte Carlo SS 3.8L.

[Boss302fan]

My son's 2003 Monte Carlo SS 3.8 V6(90K miles) runs fantastic on QS Defy 5W30. I have used PP, Mobil 1 Extended Performance and now Defy. This car runs noticeably better on Defy then the other mentioned oils. I was never a QS fan until I tried Defy 3 OCI's ago... The 3.8 runs very smooth on this oil. Give it a shot. Currently doing 5K OCI's.

 

[wtd]

I used to have a supercharged 2004 Monte Carlo SS and I ran Pennzoil Conventional 5w30 in it the entire time I owned it and it ran quiet and smooth.

The 3800 used to require a 10w30 but they later changed it to 5w30.

I bought it with 87,800 miles on it and traded it in at 100,600 miles. No engine issues at all.

Wayne

 

[WiskyBadger]

Originally Posted By: Boss302fan
My son's 2003 Monte Carlo SS 3.8 V6(90K miles) runs fantastic on QS Defy 5W30. I have used PP, Mobil 1 Extended Performance and now Defy. This car runs noticeably better on Defy then the other mentioned oils. I was never a QS fan until I tried Defy 3 OCI's ago... The 3.8 runs very smooth on this oil. Give it a shot. Currently doing 5K OCI's.
My wife had one for the 3 years we dated, it was also a SS with the 3.8. I put Formula Shell, Mobil 1 Super 5000, and Carquest in it during that time all in the 10w30 flavor and all ran smooth for 4k ocis. Why were these engines spec'ed for 10w30 anyways?

 

[cheech279]

No one has asked about the "new" engine. Remanufactured like a Jasper or was yours rebuilt?

 

[OhioGuy82]

It's a GM 19168948 Reman.