Like posted above, I've seen STP save a few old worn out aircooled engines (VW). As a youngster I remember one of the mechanics at the FBO I worked at using STP for a continental aircraft engine overhaul. Approved or not for aircraft it was his choice, he said he's the one signing off the paper work.

Kicking self for selling off my Taskforce trucks.
Still looking for an LCF or conventional big bolt in decent shape.


As of 10-26-2022, A 55.2 Taskforce long bed now the work begins