Corvette Forum : Corvette Forums banner
1 - 1 of 22 Posts

· Registered
40 Posts
Check the label I dont think Mobil 1 extended performance meets GM 4718M. I would use the normal Mobil 1.

I will say this, I have a 09 Z06 with low miles. It picked up a mild piston slap sound during warm up. I have since switched to Pennzoil Ultra and after about 1,000 miles the piston slap has disappeared. I also only use Top Tier gasoline now.
1 - 1 of 22 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.