Dexos1 Gen 2: Dexos1 Gen 2 replaced the previous generation and was introduced in 2017. This specification is more stringent and includes requirements for better protection against oxidation, deposits, and wear.
Dexos2: Dexos2 is GM’s lubricant specification for diesel engines and mainly concerns vehicles that require high performance under demanding conditions.
DexosD: The DexosD specification applies to lubricants for diesel engines that meet the strict requirements of General Motors’ modern diesel engines.
GM-LL-A-025: The GM-LL-A-025 specification applies to lubricants for gasoline engines used in General Motors vehicles.
GM-LL-B-025: The GM-LL-B-025 specification applies to lubricants for diesel engines used in General Motors vehicles.
It reveals how viscous a lubricant is. It is determined by 2 numbers. The first with the letter "W" (Winter) refers to how the oil flows when it is cold. The second refers to how the oil flows hot under engine operating conditions.
Semi-Synthetic: Combination of synthetic and mineral oils. They offer better performance than traditional mineral oils, while being more economical than synthetic ones. Ideal for mid-range vehicles.
Synthetic: Oils created from chemical compounds, aimed at providing high performance and protection for the engine. They have a homogeneous composition and greater resistance to extreme temperatures. Ideal for modern high-performance engines.