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13. An older engine that uses flat-bottom lifters should have an adequate amount/number of in its oil or oil-additive. A. viscosity B. ZDDP (zinc) C. diesters D. polyalpholefin (POA)
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13. An older engine that uses flat-bottom lifters should have an

adequate amount/number of in its oil or oil-additive.
A. viscosity
B. ZDDP (zinc)
C. diesters
D. polyalpholefin (POA)

User RiverTwilight
by
4.4k points

1 Answer

3 votes

Answer:b ZDDP (zinc)

Explanation:Most engine and engine component manufacturers recommend zinc and phosphorus content of more than 1,200 PPM for break-in; in fact, many will void warranties on camshafts or crate engines if this minimum is not found in the oil sample you supply when returning broken parts for warranty.

User Martin Schaer
by
3.6k points
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