Power Plus 4 Stroke Synthetic Kart Racing Oil utilizes a proprietary blend of anti-friction and extreme pressure additives along with a unique synthetic base oil crucial to the needs of air cooled splash type system racing engines commonly used in kart, quarter midget, trophy kart and Jr. drag racing. Power Plus Kart Racing oil eliminates carbon build up improving ring and valve seating along with the ability to maintain maximum power output. This advanced formula was developed under the most severe racing conditions and has been proven to maximum horsepower and torque while also lowering operating temperatures. Power Plus Kart Racing oil has been used to win hundreds of national championships in kart and quarter midget racing. When looking for “The Unfair Advantage” racers choose Power Plus. Due to manufacturer’s new procedures, this product is no longer available in quarts. This product is only available in 15 oz bottles now.