It turns out that it was the 5.2L V-8 so I only needed five quarts. I put in the three 10W30 quarts I had on hand and finished with two 5W30. I showed him how to check the oil and gave him a quart and a funnel and told him to check it monthly. When I drained it, only about 3.5 quarts came out so I showed him and explained how he needs to keep a close eye on that. Thanks all.