My 04 F150 5.4 3v has had motorcraft syn blend and a motorcraft filter. in it for 186k miles. This is now just a back up truck, as I bought a 11 Sierra. Anyways. I swapped to Mobil 1 synthetic. 5w30 vs the syn blend 5w20. I am hearing on certain mornings a tad of a barring noise. It does not have me worried, as it holds 3/4 of the gauge. I just changed the oil and now I a hair above 3/4. Should I worry about swapping it out now? I am not looking for performance, merly to quiet the motor down, which it did. Do you think I will start burning oil? I had a 56k mile 90 5.0 GT back in the day and I went from havoline to mobil 1 and it used a quart. How do these new mod motors react to oil swapping?