Quote:
Originally Posted by Dave R
I'm a huge fan of Shell Rotella T4 15W-40 in applications like yours, I buy it in 5 gallon buckets and it's great stuff for very little money. If you really want synthetic, T6 5W-40 is also available.
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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.