[bombcar]

As long as Jiffy Lube doesn’t put the new oil in the radiator.

Sometimes you do things yourself because that’s the only person you trust.

But oil changes are one of those “do it yourself once so you understand it and then let Walmart do it” kind of things.

[SoftTalker]

I've had shops do all of the following (not at the same time but each has happened before I stopped letting them change my oil):

  - fill with the wrong weight oil
  - not change the filter
  - not tighten the new filter adequately, resulting in leaks
  - install a very low quality "no-name" filter
  - overfill the oil
  - overtighten/strip threads on the drain plug.
  - leave tools under the hood.

And that's just oil changes, one of the simplest things a shop can do. Maybe it's because they put their least skilled people on it, but it doesn't incline me to trust them for anything else.