car has no leak or burn oils. my dad been own it for last 5 year and he been going to car shop for oil change with 10w/30 castrol dino, he pass this car to my lil bro, I change the oil with 10w/30 maxlife with motorcraft filter, its been 4-5 month now, and I just check the oils its very dark color and low haft quart. Should I continue using this oils or any other oils is recomment ? mostly use for very short trip, stop and go , that all thanks.