I would not run that fuel if I was you....

I have seen some very oddball issues with that particular fuel........

Due to the nature of it, there is a good chance your engines have been breathing thru the front bearings...I would pull those bearings out and pull the shields and look to see if there is any "black grease" inside of them......... If you do indeed see that there is black grease in them, then that most likely means you have been ingesting dirt thru the bearings........ 28 engines operate with fairly high crankcase vacuum and are more prone to breathing thru the bearings, especially if you run a thinner fuel like the Trinity..........Once the engine breathes thru the front bearing dirt gets into the engine and causes it wear out prematurely...... From what I know the Trinity is very low oil content, which will lower its ability toi properly seal the crankcase......

"Black Grease " is the black sludge that builds up inside the bearing, it is basically pulverized dirt mixxed with oil, it resembles grease, but behaves like a lapping compound inside your engine.........