Suggest hunting down the engine builder. Can't get in touch because he's busy, on vacation, or closed the shop and split to Mexico?
Having the 2nd mechanic check it out might total void any possible warranties with the original builder if that "investigation" involves opening the engine up.
Did you have a low oil pressure light previous to this (any time during the previous 2 hours of run time)?
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
