Product Description 5kw Portable Generator, 15 HP Genour OHV Gas Engine, Overhead Valve Engine Provides: 1. Improved Fuel Efficiency, Longer ... : single cylinder, 4-stroke, air-cooled, OHV, gasoline engine Displacement [cc]: 389 Compression ratio: 8.5:1 Rated power [(HP/rpm ... Fuel type: automotive unleaded gasoline Lube oil brand: SAE10W30 (above CC grade) Low oil alarm system : With