The pressure differential across a diesel engine lube oil system duplex filter should be checked to （）<br>A:determine the need for filter cleaning<br>B:measure any change in oil viscosity<br>C:prevent damage to the filter<br>D:determine the need for batch filtration

The pressure differential across a diesel engine lube oil system duplex filter should be checked to （）
A:determine the need for filter cleaning
B:measure any change in oil viscosity
C:prevent damage to the filter
D:determine the need for batch filtration

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