HMMWV engine oil pressure changes.

The current engine oil pressure requirements in all HMMWV national maintenance work requirements (NMWRs) and technical manuals have been revised, Operating oil pressure requirements for engine rpm above idle should be changed from 40-50 psi to 30-50 psi and 40 psi should be changed to 30 psi. Minimum oil pressure at idle will remain 10 psi. Make a note until updates are made.