• Subscribe
  • Magazines
  • Advertise
  • Contact Us
  • Podcasts
  • Buyers Guide
  • GSE Expo

    • Jim Cavanagh

    Content from the Author

    Photo provided by CamGuard.
    Varnish like substance on this Continental IO-550N piston and pin can lead to deposits and sludge. This engine was on a Cirrus SR-22, reported to have an average oil change interval of 55 hours, 400 hours since top overhaul, and no oil additives.