[SpitAndDirt]

I agree with the valve seal replacement suggestion. I did them on my 96 Z71 5.7L at 155,000 and now I don't use but 1qt over a 6,000 mile interval. Before I would use a quart or more every 3,000 miles. By the way, do you only use your truck for short trips consistently? You may have a lot of sludge built up in your valve cover areas and in the oil pan. Short trips are hell on a vehicle, make sure your giving enough time for the engine to warm up and boil off any condensation in the oil which leads to sludge formation. -Chris