Pennzoil 550038340 High Mileage Vehicle 5W-30 Motor Oil (SN) 5qt jug Cleans out up to 40 percent of engine sludge in the 1st oil change; Continues to clean in the second oil change Helps prevent sludge and other damaging deposits Helps clean up engines by gently lifting sludge deposits off engine surfaces and dissolving them safely into the oil Keep your engine clean and responsive Provides proven wear protection Conventional motor oil compatible with most vehicles Helps prevent sludge and other damaging deposits Helps clean up engines by gently lifting sludge deposits off engine surfaces and dissolving them safely into the oil Keep your engine clean and responsive Designed for vehicles over 75,000 miles