My daily driver is a Volvo XC90 w/2.5 Turbo motor. This 5 Cyl motor is hauling around a lot of vehicle, and tows the boat on occasion, so I do try to get a really good oil in there. So far, I have used GC 0W30 and M1 0W40. I made a couple of stops today, but could not find either product. What is the next bestm easily available choice for an OCI of 5K to 7.5K? M1 5W30 TSUV, M1 5W40 TDT? Other brands?