Hey Fellars... I just requested the free oil sample kit from Blackstone. Is that what most of you guys use? I have a brabd new F150 with the 5.4l engine. I dropped the factory oil and filter at 501 miles and installed a Motorcraft FL820-S and Valvoline 5w-20. I am going to drop the oil and filter again at 1000 miles and install a new filter and Pennzoil 5w-20 of Mobil 1 0w-20 I have'nt decides yet (leaning towards the Pennzoil) I will submit an oil sample after I get 5000 miles on thiis truck. I may need help looking at the report as this will be my first one. This is a really informative site. Information overload at times but good non the less...