I'm wondering if I can get away with using an engine oil like 5w30 in place of the s/c oil just for a little while? I know the coupler is bad for sure, it sounds like marbles. The s/c oil is way over due to be changed and it's pretty low.
I have searched. I have found some people saying they saw something from GM saying something like 5w30 was OK. Some say it's OK while others say no way.
I'm having a hard time finding the s/c oil at local dealerships. I know I can get it online.
Just wondering if this is an option for a short period of time. And just change it every 3,000 miles with the engine oil. Or is the s/c oil is the absolute only option.
Thanks in advance.