I recently obtained a 1995 Tigershark Monte Carlo and I am a little confused about the injector oil. The manual states that I should be using Tigershark 50:1 injector oil. There aren't any places around me that sells anything for Tigershark. Is this a TC-W3 oil or is it an API oil. It seems there are different types of oil for 2 cycle engines, some for pre-mix and some for injection systems. Can anyone clear the air for me? Thanks so much.