What do you use? Options

[turbohcar]

I know it's been talked about before, but I'd like to go a little more in-depth. Oil. Which grade to be more specific. I've read a couple VFAQs on it and had experience choosing oil (I change oil for a living at a Dodge dealership) for different vehicles. However, the only vehicle I am concerned about with this post is the 4G63T motor. Post what you use and why you use it. Like I said, brand isn't as important because most of the time it's a matter of opinion, it's more about the grade.
Right now I'm using Cenpeco 5w30. It's a paraffin wax based oil that is made for high performance vehicles. Pretty expensive but worth the price for an all race motor. I'll be switching to Valvoline Synthetic here the next oil change but I'm not sure yet which thickness. Thanks

[SCCA Stang]

For the same reason that vegetable oil would not seal the cylinders as well as motor oil.  A thicker oil has more ring sealing ability, which is why products like "motor honey" and lucas stabilizer reduce smoking (blowby) in worn engines.  All those things do is add a few chemicals and thicken the oil.  The chemicals may or may not help, they could easily be "snake oil" placebo-type stuff.  Not sure on that end.

I was not asserting that a particular brand seals better, I was stating that based on viscosity.

I tend to agree with you on this as I have noticed more "blow-by smoke" out of mine at higher boost levelsand RPM's w/ 5W30 Mobil 1 than w/ 10W30 Mobil 1

I only run the 10W30 in the Cavalier in the summer... in the winter, I run 5W30 in it