I’ve been using Gibbs for years. Haven’t found anything else that I like as much. Plus it also makes good starting fluid for test firing your motor after you get it unstuck.
I have tried putting Gibbs in the combustion chamber(s) and pressurizing it with compressed air. Just another way to force it along the cylinder walls and crawl in among the piston rings.
Best,
PM T2
He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...