What type of oil is generally used for Jetta?
2 Answers
The original oil for Jetta is 5W-40 semi-synthetic oil. For later maintenance, you can choose brands such as Shell, Mobil, Castrol, or Total. The oil model recommended in the official Jetta manual is 5W-40, and any oil model that meets these specifications can be used. The viscosity of the 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 kinematic viscosity of the oil at 100°C. A higher number means the oil can maintain its viscosity index better at high temperatures, which can also be understood as better lubrication performance under high temperatures. The method for changing the oil in a Jetta 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 for about 30 seconds to allow the oil in the main oil passage 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 oil filler cap on the engine valve cover. Typically, fill about three-quarters of a bottle. Start the engine and let it run for 5 minutes, checking for leaks around the oil drain plug and oil filter. If there are leaks, perform necessary repairs. After stopping the engine, pull out the dipstick to check that the oil level is within the standard range.
I've been driving a Jetta for many years and often discuss oil choices with fellow car enthusiasts. Generally speaking, the Jetta is suitable for 5W-40 full synthetic oil. I use this type of oil for every maintenance because it meets Volkswagen's VW 502 standard, protecting the engine from easy wear. I change the oil approximately every 8,000 kilometers myself to avoid extended use, otherwise sludge buildup can shorten the engine's lifespan. In cold regions, I use 0W-40 synthetic oil for smoother cold starts. Remind everyone to check the owner's manual, as there might be slight differences between new and old cars. Remember not to skimp and use mineral oil, as it performs poorly and increases fuel consumption. Regular maintenance can save big on repairs, and the car runs quieter and smoother, making long trips worry-free about breakdowns.
