question to all purveyors of " synthetic oils". has anyone ever read a paper or seen in print anywhere,an article concerning a synthetic zinc,phosperous,boron,calcium,magnesium,etc all of which are part of the additive pak. which is the heart and soul of any motor oil or gear lube or transmission fluid, or bearing grease etc.without these non-synthetic ingredients no engine, trans.,ring and pinion,wheel bearing,universal joint,cv joint,etc;would last for 50 miles.a world reknown surgeon is not very effective without his instruments and assistants. likewise a" full synthetic " has the same effect ;especially where internal combustion engines are involved.