Should the Prado 4000 use 95 or 92 octane gasoline?
2 Answers
According to the fuel cap indication, 95 octane gasoline is required. Below are the relevant details: Definition of gasoline octane rating: The gasoline octane rating represents the octane value of the gasoline. For example, 95 octane gasoline consists of approximately 95% isooctane and about 5% n-heptane. Gasoline anti-knock properties: Since isooctane has better anti-knock properties while n-heptane has poorer anti-knock properties, a higher octane rating indicates better anti-knock performance of the gasoline. Based on the engine: Whether to use 92 or 95 octane gasoline depends on the engine's operating temperature and pressure. Generally, naturally aspirated engine vehicles require 92 octane gasoline, while turbocharged engine vehicles require 95 octane gasoline.
I've been driving the Land Cruiser Prado 4000 for several years. This beast is equipped with a 4.0L large-displacement engine. According to Toyota's official manual, it clearly recommends using 95-octane gasoline as the priority choice. Due to the engine's high compression ratio, using 92-octane may cause knocking—that pinging sound inside the engine—which not only damages the pistons but also affects power output. Using 95-octane ensures smoother operation, especially noticeable during acceleration or climbing, and helps maintain stable fuel consumption. Although 92-octane is about 1-2 yuan cheaper per liter, opting for it to save money could lead to costly repairs in the long run. I strongly suggest sticking with 95-octane and not taking the risk. By the way, regular fuel system cleaning can also enhance engine durability.
