Originally Posted by
onehundred80
I am with you on this matter, if there was any benefit to be had with extra additives in the oil then the oil companies would have put it in a long time ago.
I look upon these additives at best as harmless and at worst as snake oil. They are like bottled water, you pay a lot for something that comes free from the tap. As long as you do not live in Flint that is.
Only additive I ever add to a motor is STP oil treatment (as it coats the parts some so they do not 'dry start' when first cranking). This first cranking 'dry start' is where damage to bearings/moving parts occurs. Oil companies do not add this type of thing because it costs them money. Before I started adding this to the XF, I got confirmation from Mobil1 and STP, by email, making sure they were 100% compatible.