Will 10w-40 cause any issues??
Thread Starter
Racer
Joined: Mar 2008
Posts: 445
Likes: 0
From: Mesa AZ
Will 10w-40 cause any issues??
I use strictly 10w40 in my other vehicles, and for simplicity sake, I would like to stick to using just that so i dont have several cases of oil just sitting around. Being in az, and the cars always being garaged the oil temps never go under 70 degrees or so. I searched and couldnt fin any hard evidence that this weight of oil will cause any issues but I wanted to make sure before I went ahead and did the change.
TIA!
TIA!
your fine
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
Are you going to use non-synthetic oil in your C5? I would advise against that. GM specified synthetic oil to save money by not having to put an oil cooler in the C5. The high oil temperatures, especially where you live, could compromise regular oil.
Pro
Joined: Apr 2006
Posts: 607
Likes: 0
From: Olympia Washington
I worked for Honda, people that would run heavy oil 10-40 would start using oil. What was happening is the oil control rings on the bottom of the piston, would gum up and the rings would not hold enough pressure on the cylinder wall. Just a heads up.
