Ask Paul: Does my engine need an oil filter?

Q: I just purchased a 1978 Citabria 7ECA with a Lycoming O-235-C1. Just had my first oil change done — it has no oil filter! Just one, maybe two, screens.  Are these screens just as effective if I change my oil every 25 hours?  Should I add an oil filter? Is that even possible?  I run Phillips X/C and CamGuard. Your thoughts?

Jimmy Schramm, Tampa, Fla.

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Gross weight increases approved for Power90 conversion

SMYRNA, Tenn. — Just three months after completion of its second Power90 conversion to the GE H80 Engines, Smyrna Air Center reports the STC has been amended to allow for an increase of the Max Gross Takeoff Weight (MGTW) for the King Air C90 and E90 with the GE H80 engines installed.

The amendment increases the King Air C90 to 10,410 Max Ramp weight and 10,350 Max Gross Takeoff Weight. The King Air E90 is amended to 10,560 Max Ramp Weight and 10,500 Max Gross Takeoff Weight.

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