Advanced Engine Repair Practice Test 2025 – Your All-in-One Guide to Exam Success!

Hybrid electric vehicles typically require engine oil with a viscosity of SAE 0W-20. This is because newer hybrid engines tend to operate more efficiently at lower viscosities, contributing to improved fuel economy and lower emissions. The "0W" indicates that the oil performs well at low temperatures, which is particularly beneficial for starting the engine in colder conditions without creating excess drag or resistance. The "20" indicates the oil’s viscosity at operating temperature, ensuring adequate lubrication under typical running conditions without being too thick, which can impact efficiency and performance.

SAE 0W-20 oil not only helps in maintaining optimal engine performance but also supports the hybrid vehicle’s design, as these vehicles often rely on a combination of internal combustion and electric power. The lighter viscosity helps in reducing energy loss during both modes of operation. Moreover, manufacturers often recommend this viscosity grade specifically for their hybrid engines to ensure long-term engine health and reliability.