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Correct Motor Oil Viscosity for Cars with Hydraulic Lifters
 
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Question:
Correct Motor Oil Viscosity for Cars with Hydraulic Lifters
Will your Mobil 1™ 15W-50 give my '67 Corvette and my '62 Skylark with a recent rebuilt engine the proper lubrication for the hydraulic lifters sliding on the cam?
-- Glenn Symonds, Basking Ridge, NJ
Answer:
The short answer is yes. Mobil 1™ 15W-50 has a higher level of phosphorus (zinc) preferred for older sliding valve trains in higher performance vehicles.
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