I got free case of 5w-20 oil but most people say it is like water, Should I use this in my 140,000 mile 4.0? I thought maybe i can use it this winter then go back to the 10w30 or 10w40... What do ya think?
I dont think it will be thick enough to give you adequate oil pressure....so no I wouldnt use it. Even with 10w30 in my 145k 4.0 My oil pressure is on the low side of ok in the summer.