I BELIVE ITS 15W 50

Quote:

I called Mobil 1 and their 20w-50 extended service synthetic has 1200 ppm zync and double the supersyn of their regular synthetic. I run it in my car and my sons car (which has flat tappet hydraulic cam)and have had no problems. Mine has a solid roller but I like having the extra slick stuff to keep things lubed, plus both of our cars see a lot of street use.