1996 3.8 Mustang Quaker State 5w-30 3000mi.

[nwjones18]

This is my first UOA. This is the car from the 'Mechanic Rip-off' thread I had about a goodyear service center. All previous changes were with Castrol GTX 5w-30. Should I be concerned with the Sodium? Shop said she had a leaking head gasket because of the smell of her exhaust..

 

[JT1]

Originally Posted By: nwjones18

This is my first UOA. This is the car from the 'Mechanic Rip-off' thread I had about a goodyear service center. All previous changes were with Castrol GTX 5w-30. Should I be concerned with the Sodium? Shop said she had a leaking head gasket because of the smell of her exhaust..


Instead of this guessing game why do you not have your cooling system pressure tested?

 

[5sfe91]

+1 on the pressure test, are you loosing coolant?

 

[gib]

Castrol GTX uses sodium as an additive, so there'll be some residual from that. That being said, ~140 ppm seems very high for residual since I don't think Quaker State uses any.