Same thing with condemned water heaters and jet engine maintenance: Just let the pros do it.

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Using this technique, EADS has printed metal hinges for engine covers: the hinges allow the covers to swing open for engine maintenance.

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Our bodies and our minds need proper care just like our car engine requires proper maintenance and the right fuel.

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In addition, Lockheed has also indicated that it will offer manufacture of major components, maintenance work and engine assembly of the F-35 to Japanese firms.

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The airline itself is able to run more efficiently from the ability to monitor engine performance and proactively perform maintenance at times when the plane is not scheduled to carry passengers and cause delays.

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And the Volt is likely to fare even better on maintenance since it only uses the engine about 40% of the time.

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However, the existence of two different engine designs increases the likelihood of something going wrong either with the basic design or with maintenance procedures because additional complexity is introduced into the fleet.

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