In a Phoenix summer, I'd use an xW-40 gasoline engine oil. I'd want the extra viscosity in that blistering heat. Mobil 1 0W-40 or Castrol Edge or Kendall GT-1 Euro/Phillips66 Shield Euro-Tech 5W-40 would be my choice. I know, not in the book. A diesel engine 5W-40 would have the wrong additive package for our engines--it's would work but not be the best in the long run.
CX-5um, the life of oil in a turbocharged engine all depends on how the turbocharger heat is handled. To know that oil life, as you mention, a lab analysis is needed. The level of oxidation of the oil, increased by excessive heat, would be one of the signs of how the oil is surviving.
CX-5um, the life of oil in a turbocharged engine all depends on how the turbocharger heat is handled. To know that oil life, as you mention, a lab analysis is needed. The level of oxidation of the oil, increased by excessive heat, would be one of the signs of how the oil is surviving.