If you studied the history of the api specs and changes that occurred, you can see the problems that cropped up and what the oil produces did to fix it. Chevron delo was always first to meet the newer oil specs and in most cases they could pass the new tests with the oil that was already being sold. That is why I prefer to buy chevron delo as first choice, but as said, its the brand most sold out at wally world as the truckers will grab it first.
I dont know if this is still true as I dont follow the industry like I used to. After chevron, I will buy either mobil delvac or shell rotella. After all, they all pass the latests test.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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