Natural to Synthetic Oil, any complications? Options

[hurley97]

I've always used natural oil because thats what I assumed the previous owner used. I want to switch to synthetic but I've heard bad things could come from doing so after using natural for so many years.

I can't remember exactly what possible problems I was told could arise nor can I remember where I heard it but it had something to do with the deposits that form and casing leaks, etc.

Is this just a myth? I plan to just flush the system like I did when I switched weights, would that have any negative consequences?

[Steevo]

It isn't due to contaminants. It is the smaller synthetic molecule.





Most contaminants aren't due so much from the oil itself but from the EGR and ring leakage.




And finally, one of the best engine cleaners is a bottle of natural based ATF about 500 miles before a oil change. The higher amounts detergents and zinc clean up the engine and help with sealing the pores in the cast iron liners.