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Oil level does not matter too much until it gets WAY low and starts sucking air at the pickup tube which will trigger a low oil pressure check engine light, so in a way, most cars already have a warning system.
Don't know about all commercial aircraft, but in smaller aircraft most pilots lean the mixture based on EGT temps and or by watching the rpm start to fall off, then pushing mixture back in slightly. All aircraft have fuel gages and most pilots are capable of managing their fuel.
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German autos: '79 911 SC, '87 951, '03 330i, '08 Cayenne, '13 Cayenne
0% Liberal
Men do not quit playing because they get old.... They get old because they quit playing.
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