I drive my 2001 Yukon 4WD regularly , about 4,000 miles per year. Currently 172,000 miles. Im rough on the suspension heading to the trail head with my mountain bike, but I’m on eggshells on the gas pedal. But it’s worth it. I consume much less than a half a quart between annual oil changes. Just checked since last change in December 2022 and it seems like it is still completely full. I use my mechanic’s bulk 5W-30; or on my own I use semi-synthetic or synthetic 5W-30. Whatever seems like a current value, but stick to good brand.