Goes below 40 when at idle then above 40 when giving gas
Feb 24, 2012 at 2:14 PM
Why does my oil purssure go down when I let it idle then go up when I give it gas?
JEEPBOY
- MEMBER
- 1 POST
Advertisement
Oil leaks out of the engine bearings at a controlled rate, and at idle, the oil pump has a harder time keeping up so pressure drops a little. 40 pounds if perfectly fine and normal. At higher speeds the pump is running faster and the pressure builds up until the pressure relief valve kicks in and just dumps some of that oil back into the oil pan.
You'll notice less of a drop when the oil is still cold and thicker. A lower viscosity oil will aggravate the issue. It's thinner and will ooze out of the engine bearings more easily. Even if pressure drops below 40 pounds at idle with the engine warmed up, it doesn't sound like you have a problem. You're just more observant than most drivers.
You'll notice less of a drop when the oil is still cold and thicker. A lower viscosity oil will aggravate the issue. It's thinner and will ooze out of the engine bearings more easily. Even if pressure drops below 40 pounds at idle with the engine warmed up, it doesn't sound like you have a problem. You're just more observant than most drivers.
Feb 24, 2012 at 2:22 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement
parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.