Ford calls for 5w-20 synthetic blend.

Over the past 5 years I have been using 1 part synthetic to 3-4 parts regular oil in my vehicles, this gives you about a 50 % synthetic blend. I have had no problems.

Does anyone know what percentage of synthetic is in synthetic blend oil?

Thanks for all of your comments!!!

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Mark Keller
Chattanooga, Tn


F150 4x4 XLT Screw
Oxford White
5.4 , 3.73