Most car owners have a brand of motor oil they prefer to use on a regular basis. So vote for your preference and help other members decide on what they want to use.

See my post on the other thread.

Do a little research folks. Mobil 1 finishes near last place in almost all comparisons. Penzoil is good for off the shelf. Amsoil is hard to beat.

Do a little research folks. Mobil 1 finishes near last place in almost all comparisons. Penzoil is good for off the shelf. Amsoil is hard to beat.

Since Exxon/Mobil reformulated the Mobil1 motor oils back in 2005/2006 their quality has taken a hit. Pennzoil Platinum and Vavoline Synpower are probably two of the best API approved motor oils one can buy OTC.

I use only AMSOIL as well and would have to agree it's hard to beat.

I use only AMSOIL as well and would have to agree it's hard to beat.

If you could buy it over the counter, I might be more of an advocate for them but I like going into china Mart and buying 5 qts of top quality synthetic motor oil for $20 to $21.

There is a GM number that appears in the owner's manual, under the lubricating oil section, must be identified on the oil container. I can't remember it off the top of my head but it's there.

In my opinion, if you really a tough oil, Royal Purple is it. about $9.00 per quart. I was using it in my Corvette until I switched over to Valvoline; Valvoline does not list GM 6094 certification, so it will not go in my G8.

Look at my previous therad about the cert.

Do a little research folks. Mobil 1 finishes near last place in almost all comparisons. Penzoil is good for off the shelf. Amsoil is hard to beat.

I'll second that. I have used Amsoil on every car I have ever owned. Pricey but worth it. I change oil once a year or 25,000 miles (that's twenty five thousand miles).