Compression Check Log

Continental's master-orifice method sets a floating limit (often low-60s/80) while many shops still apply the traditional 60/80 rule of thumb — but the diagnostic gold is trend plus leak location: air hissing at the exhaust means valve seating, at the breather means rings, at adjacent cylinders means head gasket. Logging all cylinders every check (as this log does) turns next year's numbers into a comparison instead of an isolated verdict.

Often enough that the series outweighs the noise: every oil change for analysis-type records, every flight or weekly for monitor-derived numbers, every annual for inspection-type checks. The honest rule is consistency over frequency — six identical-format entries a year beat sporadic bursts, because trend reading depends on comparable conditions and unbroken sequence more than on raw volume.

By design: operational records are sensitive, and the simplest privacy guarantee is never transmitting them. Local-only storage means zero servers, zero breach surface and zero subscription. If you work from several devices, keep one as the master record and move snapshots with the CSV export.

Yes — one click exports your complete engine condition record as a CSV file that opens in Excel, Google Sheets or Numbers. The export preserves every column exactly as entered, so you can print it, attach it to paperwork, or hand it to an inspector, buyer or insurance underwriter as a supporting summary alongside your official records.