no additives, no oil flush.

additives are just an added expense. worse, they can ruin your engine. lalo na yang mga motor-up o pet na yan pag naglagay ka nyan mapapansin mo biglang baba ng mileage mo. i already destroyed 2 engines using pet, i will not use it again.

engine flush? i'd rather drop the oil pan and do a manual clean than wear down the piston rings, cylinders and bearing when you use that sh!t.