Hi, After lots and lots of reading, I had settled on using Rotella T6 and T5 for our equipment. My family has a farm and we have various equipment I maintain. I've been doing the research, trying to select a high quality oil, and I thought I found it in Shell Rotella, but then I just read a few things that are concerning. When the triple protection first hit the market a few years ago, the Rotella website had a section describing called Extreme Loads. Remeber that one? Where they said the oil was put to the test in the real world in Australia in these big trucks. Well, it has been taken off the website. Then just a few days ago, I noticed theat the product info for T6 was changed on the Rotella website. In one section it used to say that the T6 contained "a novel and unique anti-wear system", now it doesn't say that anymore, yet, it still says that in the product data sheet on Shell's website. Also, the datasheet for Pennzoil Ultra, when it first came out that it was for those wanted "the best", now it is saying for those who want "our best". Is Shell just playing it safe with their marketing? I was all set to use their oils because all the reading I have done has lead me to lead that they produce good oils, now this has me wondering, what are they doing? It almost seems to me as if they themselves are taking a step back and don't want to say that their oils are top of the line, high quality products. Can anyone shed some light on this?