ok guy i am tripping balls here . i sent my oil in for an analyst . i used als tribology in edmonton . came back and they said everything seems normal except the potasium level is high? 1888 pmp . i used mobil 1 5 w40 synthetic and change every 5000 km i also used 8 oz of rev x in that oil i have 190000 km on the 6.0 2006 . they said bc of the high potasium level i could have a possable coolant leak . after some research i found that rev x has a high level of potasium in it ...can any one tell me if i should worrie about this? any one have some lab resaults with rev x ? has anyone had the same thing happen to them ? just looking for some posative answers i guess ? thanks for the time guys ...............lease: