Mar 25, 2007, 10:50 PM. I am needing to know how long Lortabs and Percocets stay in your system. Lowtax4eva. Mar 26, 2007, 11:10 AM. I assume you are having a drug test, it would depend what they test, blood: about 24 hours, hair 90 days, urine: up to 3 days.
So do you you'll generally have to lift the car up, crack the drain bolt open, let it drain then change the oil filter. Then replace the drain bolt and fill it up with oil. Draining it takes the longest and the whole process takes around 30-45 minutes. , Well over ten years as automotive tech and line mechanic.
If you insist on engine flushing, you can try this method. First, change the oil and filter and on a five quart capacity system, fill the engine with 4-1/2 quarts of 10W oil and a half quart of kerosene. Turn the engine on and let it run by itself for 10 minutes or so.Don't rev the engine! The drained oil should be quite dirty.irst, change the oil and filter and on a five quart capacity system, fill the engine with 4-1/2 quarts of 10W oil and a half quart of kerosene. Turn the engine on and let it run by itself for 10 minutes or so. Don't rev the engine! The drained oil should be quite dirty.