As an oil company, we are frequently asked whether vehicles can use a different viscosity oil than what the manufacturer recommends? Although this question is asked by operators wishing to gain benefits of lower viscosity oils, it comes up predominantly among the enthusiast or racing performance crowd, who are looking for a high-performance product for their modified engine.
The short answer to the question is: it depends.
First, it is important to know what the viscosity numbers mean. Here is a recap: