Should the Tayron use 5W-30 or 5W-40 engine oil?

[MollyLee]

The Tayron should use 5W-40 engine oil. Differences between 5W-30 and 5W-40 engine oil: 5W-40 offers better oil stability than 5W-30 under extremely high-temperature conditions in the engine. For older vehicles, using 5W-30 oil may result in slightly louder engine noise compared to 5W-40. For oils of the same quality grade, 5W-30 has better fluidity than 5W-40, which helps reduce fuel consumption and dissipate engine heat more quickly (low-viscosity oils have better fluidity than high-viscosity oils). For engines that strictly require 5W-40, using 5W-30 may lead to higher-than-normal oil consumption (commonly known as "burning oil"). Meaning of engine oil grades: These indicate the viscosity and quality of the oil. Gasoline engine oil quality grades are classified as: SA, SB, SC, SE, SF, SG, SH, SJ, SL, SM, with quality increasing from left to right. The "S" stands for gasoline engine oil, and the following letters represent the grade. Low-temperature viscosity grades are: 0W, 5W, 10W, 15W, 20W, 25W, with smaller numbers indicating better cold-start performance. "W" stands for "winter," indicating low-temperature performance. For example, 0W oil freezes at -35°C, while 5W oil freezes at -30°C.