break-in oil?

Diesel oils have lost there zinc content due to EPA,your new diesel trucks run standard heavy duty oil which contains no zinc,for the fact they have cat,converters and can not take the content as with all the newer cars have been for years.You can use conventional motor oil as long as you have the proper additive,Hughes makes one as well as Comp Cams,there are some motor oils out there you can still run straight and be fine.I run the Brad Penn
oils and still add some Comp additive,if available,the Brad Penn cost me the same here as conventional oils through my distributors.