Philadelphia area Silverliners even made it to Virginia! There are published color fan trip photos of them on the Potomic Yard hump, reached via the Virginia Ave. tunnel.
When PennCentral made connecting evening Suburban Station - Trenton and Penn Station - Trenton locals use the same equipment, but different crews, the mimeographed typewritten sheet announcing the service also mentioned how many cars (2 or 3) and whether Silverliner or Jersey Arrow.
The "non-stop" 1965 World's Fair Excursions from Lower Level 30th St. used Silverliners, but passengers had to change to a regular Long Island train across the platform at Penn Station.
When I rode it to the Fair on a Saturday in June, 1965, it stopped for a moment at Trenton, N.J., possibly to change crews.
Before Amtrak, the overnight Washington - Boston Federal leaving 30th St. at 1:03 a.m. didn't run Saturday nights - Sunday mornings. On Sunday mornings, there was a 1:05 a.m. 30th St. - Penn Station train. When I rode on March 19, 1969, it was 2 Silverliners. I didn't check what happened in the other direction.
Silverliners were used as Harrisburg locals over the years. State aid for them may have been funneled through S.E.P.T.A.