i use andvance auto brand 5W-30 as my "cheap oil" i used it when breaking in teh 3L, i use it in the bronco, especially after the head gasket replacement. costs 99 cents a bottle and works fine. accually its in the 3L now (was broke, couldnt afford mobil1, but will use that from now on)

Russell Oval Port 3L Nearly Done MTX75 w/ Homebrew Zetec FD and Torsen Complete