What is the 2007 chevy trailblazer 4.2 oil capacity?

The Chevy TrailBlazer with the 4.2L engine has an oil capacity of 7 quarts when You need to do an oil change. Chevy recommends that You use full synthetic oil when You need to change it. Oil comes in two major varieties, synthetic and conventional. Synthetic is engineered to provide better protection and last longer than standard conventional oil that is made from petroleum. This means You will need to have less frequent oil changes. Usually synthetic can be changed every 7,500 miles compared to 3,500 to 5,000 with conventional. I recommend checking Your oil at least once a month to make sure that it is full and free from debris or signs of burning.