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Originally Posted by zrayr
Actually, Mobil 1 15W-50 has more zinc & phosphorus that the current formulation of Shell Rotella. If you don't want to use a synthetic oil, the best way to go is to add some Comp Cams (or Crane) break-in oil with every oil change.
BTW, I've personally used Mobil 1 15W-50 in both small block & FE Ford engines with zero leaks, wear, or problems of any kind for over 25,000 (hard) miles. Don't fall all the urban myths surrounding synthetic oils. Actual scientific studies on this subject are nonexistent.
Z. Ray |
It is a fact that
synthetic oils have superior qualities over conventional oil. It is
not an "urban myth" that they are more slippery. If there is an area of a particular engine that is prone to leaking, synthetic oil will find it more easily.
It is
not an urban myth that FE's are more prone to leaks because of the block and head design. I'm glad you had one that didn't leak with synthetic oil.