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

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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..
 
Originally Posted By: nwjones18
MustangOilAnalysis.jpg


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?
 
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.
 
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