RZWILL RZ21E Engine Oil Sludge Remover, 300 mL

RZWILL RZ21E Engine Oil Sludge Remover is a professional-grade additive engineered to dissolve stubborn sludge, varnish, and clay-like deposits in engine oil systems. Its advanced solvent blend safely breaks down contaminants without harming seals or internal components. It enhances oil flow, minimizes carryover contamination from old oil, and ensures optimal protection during oil changes. Compatible with gasoline and non-turbo diesel engines, it’s also recommended for pre-drain cleaning of DSG automatic and manual gearboxes. Effectively restores lost compression caused by piston ring clogging and supports preventive maintenance of hydraulic valve lifters. One 300 mL bottle treats up to 5 liters of engine oil, meeting European performance standards and OEM compatibility requirements.