used it afew time on cars in work baz.works as well as the others around,wynns engine flush is also good(been around for yrs)but from my point of view they all do the same thing..
Saying that,i did buy some stuff a few yrs ago that u put in after u drained ure oil(came in a 5ltr container)and filled to the max on the stick then ran for the stated time..
seemed to work well as all the dirty oil in the sump wasa already out..
