This is off another Nissan Frontier. The individual has been having the oil changed at the Nissan dealer since he bought it and it has 136k on it. He has had it changed every 3 to 4k miles, at least that is what he told me. I changed the oil for him this time because he helped me out a few times around the house and takes care of cats when we are gone and didn't want paid so I changed the oil for him for free.
The drain-back valve was soft and flexible.
The drain-back valve was soft and flexible.