What kind of oil does pump, not the engine, on the Husky HU80520 Power Washer use?

Just a few drops of 30w, there should be a small open cap above the pump, possibly with some starining material stuffed into it.

Husky Model HU80520 uses 4-stroke engine oil SAE30 . Thank you.

Husky Model HU80520 uses 4-stroke engine oil SAE30 . Thank you.

Husky Model HU80520 uses 4-stroke engine oil SAE30 . Thank you.