How to change oil on 90 nissan maxima - 1990 Nissan Maxima

Park the car on a level surface, let the engine warm up, Locate the engine-oil pan under the car, and remove the drain-plug. Put a container under the oil-pan to collect the old oil. Remove the oil-filler cap on top of engine head-cover. Remove the oil-filter by the engine block. You could grab it with one hand and turn counter-clockwise. While waiting all oil to drain out, smear some new engine oil on the new oil-filter 'o'-ring, and screw it back in place. Tighten 3/4 turn after the o-ring hits the engine surface.
Clean the drain-plug with a clean rag and tighten back in place-not over-tighten it!. Put back about 3-quarts of new engine oil through the oil-filler cap, and hand tighten the cap. Start the engine and look for leaks. After a few hours later, check the oil level. You are done!