What is the best engine oil for Buick Envision?
1 Answers
Buick Envision's original engine oil specification is 5W-30. For later maintenance, you can choose Castrol, Shell, or Mobil 1 Silver, all of which are fully synthetic oils. 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, making cold starts smoother. The latter number represents the oil's kinematic viscosity at 100°C. The higher this number, the better the oil maintains its viscosity at high temperatures, which can also be understood as better 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 drop, allowing the oil to flow back into the oil pan. Use a wrench to loosen the oil drain plug and place an oil pan underneath to catch the old oil until it stops flowing. Start the engine and let it run for 30 seconds to allow the oil in the main oil passages to drain out. Use a specialized wrench to remove the oil filter. Apply oil to the seal of the new oil filter and tighten it clockwise by hand. Add the new oil through the engine's valve cover oil filler port, typically filling about three-quarters of the oil container. Start the engine and let it run for 5 minutes, then check for any leaks around the oil drain plug and oil filter. If leaks are found, repairs should be made. After stopping the engine, pull out the dipstick to check that the oil level is within the standard range.
