I premixed two cycle "air cooled engine only" oil - type tsc-3 with gas prior to running about 3gal (of 6 total) in my '77 merc 80hp. I realized back at the dock when i looked at the bottle- the boat ran fine but I'm wondering if its a big deal that i didn't use NMMA TC-W3, should i just add 3 more gallons of gas into the tank with the correct (TC-W3) oil and run it out or should i discard it and be concerned about any damage that could have been done? Does anyone know what the difference is between TSC-3 an TC-W3? Thanks in advance.