17 Is synthetic oil compatible with other oils.
Description
This article is from the VW Performance FAQ, by with numerous contributions by Jan Vandenbrande others.
17 Is synthetic oil compatible with other oils.
A:Here is a blurb from Mobil, and it is probably true for
most other synthetic oil.
Compatibility With Other Oils
Mobil 1 is fully compatible with conventional oils. The
two types can be mixed with no adverse effects. Mixing,
however, will reduce the level of benefits Mobil 1
offers.
Precautions for Mixing with other Sythetic Oils
Mobil 1 should not be mixed with any other synthetic
products or oil concentrates. The chemistries could be
incompatible which can lead to a dangerous reduction in
lubricant performance. When switching from other
synthetics to Mobil 1, it is recommmended to flush the
engine first with a conventional oil prior to the change.
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