Hi mates,is an old thread but would like to contribute some insight to present or future users,i ran the all trans 1150 tranny fluid on a 4r100 for the past 5 years so far so good,i'm at 200k with the same tranny with more than 150 passes at the drag strip,also ran monolec 8800 engine oil for 16k intervals,still running same injectors since bought new.Is it good stuff?for me it is since i hope to bury my truck to the ground(7.3 psd),i consider the two best oils in the planet lubrication engineers and clubber,cost effective?not because now i think a good quality oil would get me were i'm now,peace of mind knowing i beat the [censored] of my truck and it wont break?yesss,my point is there is an oil for different aplications,some have a safety margins others dont have the science,hope to be of some help,Roderick