Do not add anything to the oil. The recommended oils meeting the dexos specification are all that is needed for good performance and engine protection.
Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty.
Oil Pan Installation Engine Lubrication Oil Sump/Pan
Place a 3-mm (0.118-in) bead of RTVsealant on the block pan rail and the crankshaft rear oil sealhousing-(1). Refer toAdhesives, Fluids, Lubricants, and Sealersfor recommendedsealant.Position the oil pan-(1) onto the block.Loosely install the oil pan bolts-(1)and-(2).Caution:Refer toFastener Caution ...