I was at the motorcraft website and entered my info (97 mustang 4.6) and under the oil section they recommended 5w-20 (no suprise I think they recommend this for new and older Fords now) anyways under optional oils they listed 5w-30 (what my manual says..) but to my suprise they also listed 10w-30 as an optional oil that is approved for use, I remember there was some talk here that a thinner oil such as 5w-30 was needed to reach the top of the engine faster? Thoughts?
Thanks
Thanks