Mobil 1 synthetic diesel truck oil is only 12.99 a gallon at autozone:
https://www.autozone.com/images/MEDIA_ProductCatalog/m2840020_p4-f14-circular-r.pdf
It is not my brand of choice but it is less than half price from what walmart sells it so I bought some anyhow but for anyone in the really cold weather this is a steal
https://www.autozone.com/images/MEDIA_ProductCatalog/m2840020_p4-f14-circular-r.pdf
It is not my brand of choice but it is less than half price from what walmart sells it so I bought some anyhow but for anyone in the really cold weather this is a steal