Kirkland.(Costco) is now offering their own oil. who is bottling it for them.
I agree with grit dog that regular maintenance is the key. napa and WIx are the same filters, made in the same factory. Baldwin for HD applications is a good choice.
If you choose to have your vehicle serviced by the quick lube places ignore their wanting to change your air filter @ 35 to 40 dollars a piece. drive to your local auto parts store and get one for a fraction of the price. I am here to save you money.
As far as the preferred oil? IDK.
