We recently completed a cross country trip...ran the generator about 100 hours with no problems. Lots of towing down the road and rest stop use. I do run good fuel with SeaFoam and run Royal Purple SAE 30 oil. When I changed my oil prior to our trip, the oil level was about 1/4 quart low...
With that said, my smaller TH has a genset that sits sideways in the trailer...if the oil was low, it would turn off while in motion...I am guessing from low oil pressure...
TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around