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25/10/2021 3:26 pm
Topic starter
I have a 2010 Mercury Mariner Premier V6 4x4 with 213k miles. The oil light pops on while idling but immediately turns off if I rev the engine in neutral or resume driving. I figured the pressure was low from low oil but I changed the oil with the same oil light results. It takes 6qts of 5w20 and I use Castrol GTX High Mileage synthetic blend. What's likely causing the light?
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25/10/2021 3:32 pm
Either you really have low oil pressure (engine wearing out), or the oil pressure sending unit is bad. Verify the oil pressure with a mechanical gauge, if it's OK install a new sending unit.
