Go to bitog and look around. With the quality of today's oils you don't need to add anything like Lucas. I use a 60/40 blend of TGMO 0w-20 and Mobil 1 0W-40 European Car Formula in my 2006 Tundra. On bitog it is referred to as the Caterham Blend because the member Caterham came up with it and it is stout
