Quote:
Originally Posted by LikeLakes
BTW there is a T6 15W40 now too. I had read about it, then picked up a jug by accident and didn't notice until I went to use it. I run 5W40 T6 in my Duramax.
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I ran 5W40 T6 in my Duramax when I had it, too. Great oil and easy Winter starts. I run T4 in my boat's Caterpillar engines though. They each take 4 gallons, they don't run in the Winter and I don't do extended change intervals, so T4 is the best choice for me. I love that Walmart always has it in stock and they take 5 gallons at a time for recycling.