TC-W3 lubricant, an NMMA owned trademark, has evolved over the years through much testing and research, and has proven to be the level of quality to satisfy the above objectives. And, going a step further, now that two cycle engines have moved towards higher cylinder temperatures and compressions to meet the EPA emissions reductions. <br /><br />TC-W3 has demonstrated the necessary lubrication performance quality needed for these more demanding cylinder/engine conditions. <br /><br />NMMA licenses those two cycle lubricants that meet the stringent performance tests conducted by any one of the three sanctioned laboratories approved by NMMA to conduct the tests. <br /><br />The tests include varied bench tests for fluidity, lubricity, viscosity, etc., plus the oil must meet minimum ring sticking and carbon build up on pistons in engine tests. The engine tests include one OMC 40 hp, one OMC 70 hp, and two consecutive Mercury 15 hp tests. The tests are run for 100 hours each and the engines are stopped every ten hours for inspection. The chemical make up of the TC-W3 oils vary due to the various additive packages involved with each oil brand. Accordingly, it's a performance based qualifications program. The process is very involved and expensive, but worth the outcome for consumers and manufacturers. <br /><br />TC-W3 oils are licensed around the world and are recommended for use by two cycle engine manufacturers. <br />
