What Type of Engine Oil is Best for the Envision?
1 Answers
The factory-recommended engine oil for the Buick Envision is 5W30. The Buick Envision uses fully synthetic oil, which offers a wider temperature range, longer service life, and higher cost. For later maintenance and oil changes, you can choose brands such as Mobil, Shell, Castrol, or Total. The viscosity of engine oil changes with temperature, so special attention should be paid to its performance under both low and high temperatures. For example, in 5W-30, the first number indicates low-temperature fluidity—5W means it can withstand temperatures as low as -30°C. The smaller this number, the better the low-temperature fluidity, ensuring smoother cold starts for the car. The second number represents the oil's kinematic viscosity at 100°C. A higher value means the oil can maintain its viscosity index better at high temperatures, which can also be understood as providing superior lubrication performance under high-temperature conditions. The method for changing the engine oil in a Buick Envision is as follows: Wait for the engine temperature to cool down, allowing the oil to flow back into the oil pan. Use a wrench to loosen the drain plug and place an oil pan underneath to catch the old oil until it stops dripping. Start the engine and let it run for 30 seconds to allow the oil in the main oil passage to drain out. Use a specialized wrench to remove the oil filter. Apply a small amount of oil to the seal of the new oil filter and hand-tighten it clockwise. Add the new engine oil through the oil filler cap on the engine valve cover. Typically, pour in about three-quarters of a standard oil container. Start the engine and let it run for 5 minutes, checking for any leaks around the drain plug and oil filter. If leaks are found, perform necessary repairs. After stopping the engine, pull out the dipstick to check that the oil level is within the standard range.
