That is what I find interesting. We know that TGMO is manufactured by Mobil however Toyota specifies a different formulation including the Moly type. I'm sure if they wanted to specify what is in the Mobil 1 they would/could get that but they don't. Their other additives +/or ratios are also different which leads me to believe they've formulated it to be very specific to Toyota engines. Maybe the composition of the aluminum and steel in the engines? Who knows? I have read that TGMO has a much higher viscosity index so it stays thicker at higher temps while being thinner at lower temps than other 0W20 synthetics. As someone pointed out, with 3000-5000 mi changes this probably does not make too much of a difference but with the low parts counter price of TGMO I think that I'm going to stick with that. I'll update here and we can all compare ~200,000 miles from now!
