I have a 2015 2500 6.7 Cummins that has had a Donaldson dbl7349 and eabp 100 bypass since new, with oci intervals at 7500mi using mobil 1 5-40 turbo diesel.
I live in Northern California, the truck sees no sub 40 degree weather. Truck is at 44,500 miles as of today.
However, the truck is used now for heavy towing. 17.5k 5th wheel toy hauler. I have stuck with 5-40, as it is synthetic and not conventional.
I am finding tonight I may be doing this wrong and need to be with a 15-40 instead?
Thanks for the help fellas. This place is always great to me, but I'm more of a lurker than a poster. You guys are far superior to me in your knowledge and intelligence, so I have more to gain by reading and respecting as opposed to posting.
I live in Northern California, the truck sees no sub 40 degree weather. Truck is at 44,500 miles as of today.
However, the truck is used now for heavy towing. 17.5k 5th wheel toy hauler. I have stuck with 5-40, as it is synthetic and not conventional.
I am finding tonight I may be doing this wrong and need to be with a 15-40 instead?
Thanks for the help fellas. This place is always great to me, but I'm more of a lurker than a poster. You guys are far superior to me in your knowledge and intelligence, so I have more to gain by reading and respecting as opposed to posting.