Oh great and knowledgable ones, I had my truck down at the Firestone Tire place last weekend. I was there for belts but they were OK, so I had my oil changed. They used Kendall synthetic oil. I have never heard of Kendall synthetic. What is this stuff? Is it any good? Have you heard anything about it's makeup? It is new to me! I am not sure if I should get this stuff out of my truck ASAP. Thanks for your help.