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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[–] 5 points 6 days ago

The oil does in fact stop lubricating well too. Shear is a thing and the additive packages stop doing their magic over time too.

Still, unless you live in the desert, the body of most cars will rust through long before you spin a bearing and those are the parts that are most affected by lubrication. Unless you completely neglect oil changes of course. I'm on only 420k km and already the 20 year old rocker panels are perforated on my Audi. Engine probably has another 200-300k km in it, but the car will be unsafe to drive long before that.

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