The most important thing for a durable two-stroke engine is the choice of the right engine oil. We recommend the synthetic oil ACT Evo X-tra for standard and lightly tuned engines. The oil significantly reduces smoke and leaves hardly any deposits in the combustion chamber, piston and plug. Power 1 Racing 2T is a fully synthetic oil for highest demands. Extremely heat-resistant with excellent lubricating properties. Recommended for all heavily tuned engines. Please note that fully synthetic lubricants usually do not burn completely - this has the consequence that catalytic converters clog up faster and sport exhaust systems tend to "oil".