bd... Your two cents are ALWAYS worth something to ME!!! 
Gnarls. 
I just watched an STP vs. Lucas test. The Lucas seemed to outperform the STP, but like most tests they didn't use a control motor oil to see how much, if any, difference either actually made. I'd put my money on just about any full synthetic motor oil.
What I love are the comments from people that now feel good that they have Lucas in their engines when the test didn't address if either actually did anything beyond what they base oil would do. And that's how this type of product gets it's good name.
