What little performance differnce may or may not exist pales in comparison to the price difference when you find one of them on sale. Of the big three (Delo, Delvac, Rotella) I would not hesitate to purchase and use whatever was the least expensive at the time of the OCI.
Edited by dnewton3 (12/15/09 04:50 AM)
Conventionals vs. Synthetics isn't about which is "better"; it's about which lasts longer, while assuring safe operation, in relation to cost. Any product can be over or under utilized. The same applies to filters.
Make an informed decision; first consider your operating conditions, next determine your maintenance plan, and then pick your lube and filter. Don't do it the other way around ...