Pure curiosity: why low oil light takes 10 miles to come on after oil change?
Hello mechanics. I just did an oil change on my Mazda CX-30. The dip stick is extremely difficult to read with the thin 0W20 oil except when dead cold. So I just put in the amount of oil it looks like I drained out including what drained out of the filter. I also pre fill the new oil filter.
This process is not precise, and I have under filled it slightly (like a quarter of a quart) for the second time in a row.
Here’s my question: why does the low oil light not come on until I drive for 10 miles? I run the car for a minute to get it off the ramps after the oil change. I thought that would be enough time for the oil to fully circulate and trigger the low oil light off I was short. Why does it take so long to come on?
I was driving on level ground when it came on this time.