Although Chevron tends to be less expensive, you could use Havoline if you can find it (shouldn't be hard). They're basically the same thing, maybe not "identical", but very similar. I'm running Havoline in my 3400 V6 Grand Am, and after about 1300 miles into the OCI, I gotta say I love it. Weird thing is it seems to run smoother and quieter now than it did the first few hundred miles....oh well.