Information you can use; from AMSOIL Blog
Can I Mix Synthetic and Conventional Oil?
John Baker |Apr 13, 2015 3:58:45 PM
Some things simply don’t mix. Oil and water, for example. Alcohol and firearms. Around these parts, Green Bay Packers fans and Minnesota Vikings fans.
With synthetic lubricants continuing to grow in popularity, the question of whether synthetics and conventional oils can be safely mixed often arises. I’m guilty of having mixed different types ...