Maxima Scooter Premium 4-Stroke Petrolium 10w30 Break-In Oil is designed to break in engines with flat teppet camshafts, roller elements, or where high levels of antiwear additives are needed, giving you a premium ring seal. With this break-in oil you will have unsurpassed protection against critical engine component ware. Compatible with the 49cc Flying Horse 5G 4-Stroke bicycle engine kit, and all Huasheng 142 and 142F bike engine kits (Note: this includes Grubee 4-Stroke engine kits).