Friends renting generators, if you notice excessive oil consumption, don't panic. First, check for oil leaks at the engine body, gear compartment cover, large plate on the side wheel, and rear cover shield connections. If there's a leak, especially inspect the integrity of the sealing rubber pads at the connection points. If there's aging or damage, be sure to replace the damaged generator seal.

If the sealing washer is intact, check if the connecting screws are loose and causing gaps. Tighten any loose bolts. If the above parts are generally fine, it might indicate an issue with the frame position. Inspect the housing, focusing on the front side of the oil sump on the same side as the running wheel, carefully investigating if it's due to loose screws. Generators often leak due to loose mount screws, as the running wheel, under the pull of the belt, continuously rubs against the frame angle iron of the engine's protective oil sump, wearing through the oil sump and creating a gap, leading to oil leakage.

Long-term use of the engine can lead to wear, or wear due to maintenance issues, which can cause longitudinal scratches on the cylinder liners of diesel engines. This results in an increase in the cylinder bore diameter and piston side clearance of the generator's engine, exceeding the specified values. Consequently, the support force of the piston rings decreases accordingly, leading to inadequate oil scraping.