My mind is blown right now. I have been using M1 10w30 and M1 filter in my 3v. I even have 6 quarts left over in my shed. Thanks for years of easy to decipher information for even a novice. So it looks like 10w30 is the way to go for my car. My climate is central Florida, my commute is 20-30 min of light traffic, and then 30-40 of heavy traffic on the way back (trip is no more than 15 miles}. The car is a 2012 GT/CS 6 speed with just intake, tune, Roush AB, and a JLT oil separator on passenger side. What is the best way to check oil consumption? Is the stick accurate enough to estimate off of? I'm waiting for my fittings to come in for my JLT.