If you read any manual on changing your oil, it's going to tell you to let that thing drip for 15 to 30 minutes to clear out as much of the old oil as possible. Meanwhile, your average oil change place is advertising that they will have you in and out of there in 15 minutes from start to finish. Which means there's no way they're letting it drip the minimum of 15 minutes.

The soil change was so overdue. There is a difference between the service interval and abuse interval of oil. I definitely got into the abuse range on this occasion. I just didn't have the money for the oil and the filter.

And while you're taking care of your own oil change. Make sure to check your brake fluid engine coolant and washer fluid and top them off as necessary.

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[–] [S] 4 points 1 week ago (5 children)

When they change your oil at a shop they pull the cap off and they unscrew the plug. They don't attach anything to your car to speed the process up. And there's nothing they could do that would speed it up. Air pressure with the plug removed would just cause the air to go out the other end and wouldn't speed up the oil at all.

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  • [–] 2 points 1 week ago* (1 child)

    Full disclosure, when I was driving an ICE car I did all my own oil changes at home. However, 25 years ago I had to pay to have an oil change done.

    And there’s nothing they could do that would speed it up.

    The process this shop used was to empty the engine oil, put the drain plug in again, and fill the crankcase with new oil, run the car for 5 min with the new oil, drain again, then fill with more new oil.

    In my mind, thats a pretty effective way to get the old oil out.

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  • [–] 1 point 1 week ago (2 children)

    I feel like a lot of places nowadays just take off the fill cap and vacuum pump it out.

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