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synthetic oil in 73 911T

  • 1973
  • 911T
Mileage: 
180 000
Engine
Hailey, 
Idaho

I read in Excellence Magazine in this months issue that using synthetic oil in my 73 911T damages the seals and gaskets.  They say to use Kendall 20-50.  Do you agree?

Thank you,

Ron Fields

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