I drive a 2007 Toyota Yaris, 1.5L, VVT-i, 4 speed automatic, 2,300 lbs, 105HP, hatchback, using 87 octane Chevron 90% of the time, 60% city, 40% highway. Sticker EPA MPG is 34/39. This car uses Mobil1 0W-20 and the OCI is 4,500 - 5,000 miles, with Mobil1 oil filter, replaced airfilter every...