I am just wondering what everyones thoughts on oil additives are. I have been running Delo 15-40 because it is readily available but I had an oil analyisis done and was not to impressed with the zinc numbers. I have read a couple of the threads about oil but I am still tring to learn what things like the TBN # mean. Also I see alot of people are running some high dollar oils like Brad Penn and I am wondering if similar performance can be had by using additive with something like Delo 15-40. If so what would it take? Just ZDDP, or Rev-X or others. I will post up a shot off the oil analyisis in a little while. Thanks.