Originally Posted By: tig1
The two qts of 0-40 are for what purpose?
Well, first and foremost because I have a ton of in my stash left over from my Audi.
Second, I wanted to give the Caterham Blend a try for myself. I found this explanation of the blend from back in the day.
Originally Posted By: A_Harman
The Caterham Blend is a blend of Mobil 1 0w40 and Toyota Genuine Motor Oil 0w20. It is prized for its high viscosity index, and somewhat enhanced additive package over Mobil 1 0w30 Advanced Fuel Economy. M1 0w30 to us spec-hounds on BITOG is somewhat disappointing because its viscosity index is actually lower than garden variety M1 5w30. Consequently, it has higher viscosity during startup down to freezing temperatures. By blending M1 0w40 with TGMO, you end up with a 0w30 with higher viscosity index than M1 0w30 AFE, and since TGMO is produced by Mobil, there is minimal concern of the additive packages between the two oils clashing.