I must confess I am a delo guy 300,000 on my truck pulling a 14,000 pd 5th wheel 3 transmissions nothing but change
oil and filters on the motor still going strong. also read a lot of bob the
oil guy you should read about the 10/40 quakerstate it blew away the competition big time I may switch to quakerstate just not sure witch one. I will have to reread bobs test on quakerstate.