Originally Posted By: Joe90_guy
A 15W30 is a very logical oil, especially for a diesel.
But again, the rub is what the diesel in question is doing. Even this 15w30 is being targeted towards regional and local P&D truck operations. Fleets that run the entire 48 are not prime candidates for this stuff. Availability of fill oil on the road is critical. You cannot find one drop of 15w30 at any major truck stop in the country, and the odds are highly likely one never will. Maybe a mom and pop operation. Truck stops are only going to stock what moves. And OTR fleets are not jumping on board with 15w30. 15w40 is still king, 10w30 is rapidly gaining ground. It is nice to be able to play around with this sort of thing as a one truck owner that stays close to home. But you have Chevron running ads in all the trucking rags about how their 10w30 has tested out to 70,000 miles, without bypass, in the new commercial semi engines. Why would any fleet play games with a 15w30? No, it will only be a niche market thing.