Oil filter is inverted in the scion.Do you have to empty oil from engine before removing filter?l changed oil last week, but did not have right size filter wrench. Now l wanna change the filter.Do l have to re-change the oil?

l would its like taking a shower without soap. Oil is cheaper than steel and why put a new filter on without changing the oil

Ideally both oil & filter r changed concurrently, but it is not required. Oil filter will contain some old, dirty oil. As such, u want to change the filer when changing the oil; otherwise the dirty oil will escape from the filter & end up back in the engine.

The reason l say it is not required is because the oil amount in the filter is very low, so it will not do much harm. Also, some filters do not even have anti-drainback valves.

In ur case, however, u may indeed need to flush the oil if the filter on ur Scion is below the oil level in the oil bin, although this is rare. Do a visual check of ur Scion to see if the filter is above or below the oil bin. If it is above, you're safe in changing the filter by itself.

l worked at a dealership. no you do not have to empty the oil pan first,also get one of those claw oil filter wrench, it works best.also when your done start the car and check the oil level you may have to add some for the new filter.

No, u do not need to change the oil, unless u drove 2000+ miles in the last week . The oil in the oil pan will not be affected by removing the oil filter, the engine needs to be running for the oil pump to push oil to the filter. The filter in ur Scion holds less than 1/4 of a quart (including the oil in the line). After replacing the filter, start it until u see oil light on dash go out (check filter for leaks), turn it off - check oil level. A good rule of thumb to remember - always better to be a little low than a little over full (the crosshatched area on the dipstick is 1 qt) 1/4 qt shy is better than 1/4 qt over. But, u will hurt nothing by changing only the filter at this time. It is, however, better, to change both at same time in future.