What causes the engine oil light to come on but go off when accelerating?
2 Answers
The engine oil light coming on but going off when accelerating may be due to using the wrong oil viscosity grade. Below is an introduction to engine oil knowledge: 1. Introduction: Engine oil, also known as engine lubricant (with a density of approximately 0.91×10³ kg/m³), serves multiple functions including lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, as well as shock absorption. It's often referred to as the "blood" of automobiles. Engine oil consists of two components: base oil and additives. The base oil is the primary constituent that determines the fundamental properties of the lubricant, while additives compensate for and enhance the performance shortcomings of the base oil, providing additional beneficial characteristics. These additives form a crucial part of engine oil. 2. Requirements: As a type of machinery, engines share common lubrication requirements with general mechanical equipment, such as appropriate viscosity and certain anti-oxidation, anti-wear, anti-corrosion, and viscosity-temperature properties. However, being specialized machinery, engines also have unique lubrication requirements that differ from conventional equipment.
I worked at a dealership for decades and have encountered many such oil pressure light issues. Simply put, if the light comes on at idle, it indicates low oil pressure. When you step on the gas and the engine speed increases, the light goes off because the oil pump pressure rises with higher RPM. The most common cause is insufficient oil—check the dipstick level immediately to see if it's low. Topping up the oil might solve the problem. If the oil level is fine, the issue could be a worn-out oil pump, partial blockage in the oil passages causing poor idle supply, or a faulty oil pressure sensor giving false alarms. Don’t ignore the problem just because the light turns off when accelerating. Delaying repairs can lead to increased internal engine wear and costly repairs later. I recommend acting the same day—pull out the dipstick to check the oil’s color and level. If unsure, take it to a professional shop for a full inspection. Safety first.
