Sorry if this has been discussed before but I havne't been able fo find anything on it. Let's say you have a 5qt oil capacity (with filter) per your owners manual. What I do is drain the old oil, replace filter and plug and then fill the car with 4 qts of oil. I start the car to get the oil into the filter, then shut it down and add the other quart. On one of my cars I can't prefill the filter since it's upside down on the motor. Is that OK? Thanks!