Maxima Scooter Pro Plus 4-Stroke Synthetic 10w30 Motor Oil is a high performance synthetic blend for 4-stroke engine applications. Special synthetic lubricants and advance additives provide for outstanding engine performance and protection while maintaining excellent engine cleanliness and eliminating exhaust smoke. 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).