Operation CHARM
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Porsche
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1989
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928 S4 V8-4957cc 5.0L
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Repair and Diagnosis
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Specifications
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Fluid Type Specifications
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Fluid - Differential
Fluid - Differential
1981-88
� 90W GL-5 (Gear Oil, API Service GL-5)
1989-92
75W-90 GL-5