Cleaning oil pan sludge without dropping it- before changing to detergent based oil

[Richard Wilson]

May be a problem down the road if you are not running an oil filter system. The detergent oil will pick up the sludge and sediment and carry it in suspension. If it were me, I would keep running non-detergent oil until I knew the pan had been cleaned.

Also remember, that almost a quart of the old dirty oil will always remain in the dip tray and valve chamber when you change oil via the drain plug.