yes it is a modern 2-stoke oil. TC-W3 is the specification the oil must meet. I found it when I was searching for a gas lubricate for the needles in the needle wells, which can see lots of wear over the yrs. The needle wells are not replaceable in these carbs.
here is were I originally found out about TC-W3
https://www.ls1.com/forums/showthread.php?t=91206https://www.nmma.org/certification/oil/tc-w3""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 needed to satisfy the above objectives. And, going a step further, now that two-stroke engines have moved towards higher cylinder temperatures and compressions, this type of lubricant also helps to meet the EPA emissions reductions.
TC-W3® oils have demonstrated the necessary lubrication performance quality needed for these more demanding cylinder/engine conditions.
The TC-W3® oil standard is a performance-based qualification program. The requirements include various bench tests for fluidity, miscibility, rust, compatibility, etc., as well as engine tests to evaluate the prevention of ring sticking and carbon buildup on pistons and other engine parts. ""
