Something interesting in the service manual about oil filters. In the troubleshooting section it talks about many different scenarios of problems. For one problem mentioned “from not using an oil filter with a back Flow preventer.”
I use K&N oil filters with back flow preventers on all my vehicles. I do not see how our tiny little cartridge filter is equipped with a back flow preventer. I could be wrong but I’m not sure about that.
So does anyone know if it has one?