One-through" lubrication of (hyper-) compressor cylinders for the production of polyethylene and EVA copolymer process. It has been designed in order to avoid sludges formation and reach very high level of pumpabillity.One-through" lubrication of (hyper-) compressors compatible with polyethylene and EVA copolymer process. PX 6060 has been formulated to avoid sludges formation. PX 6060can reached very high level of pumpabillity.