Changing from reg oil to Mobil1?

[MNBoxster]

Hi,

As stated, MB1 is compatible with Organic Oil, so no problem there, just change it and go the normal interval.

But, whenever changing between any Oils, no matter what type, just Brands, there is the potential for some slight leaking at the seals. It is a fairly common wives tale that if you switch to a Synthetic from an Organic you'll get some minor seepage. This is basically true, but not because of the type rather the change in Brands.

All Brands use a proprietary mix of Anti-Oxidents and Detergents. These can be different Agents and/or be in different concentrations.

Over time, your Oil forms deposits along the edges of valve seals, valve guides, and gaskets. These deposits actually aid in sealing these joints. They are immune to the effects of the Oil you're currently running.

But, switch Brands (or types) which have a different composition or concentration of these Agents, and the deposits can be stripped away allowing for some slight seepage from the joints, or in the case of valve guides and seals, a little smoking from the exhaust.

These effects are temporary until the new Oil forms deposits of it's own, once again resealing the joints. Hope this helps...

Happy Motoring!...Jim'99