Quick Oil change question

[00stangv6lr]

I drained the oil in my car today. I forgot to get a filter(im an idiot) so I let the car sit while i went to get a filter. I installed the filter and oil and after the first startup the engine made a kind of knocking noise for about 15 seconds and then went back to normal. The car probably sat for 45 minutes when i went to get the filter. How bad was this noise, or was it bad at all? Just curious.

 

[mrvax]

Nah. You were running with little to no oil for a few secs. Even if you replaced the oil & filter all at once, but didn't add a little oil to the NEW filter before install, this will happen.

Avoid it in the future by adding a little oil to the new filter.

 

[Mustang5L5]

That's pretty normal. My car does it every time i change the oil.

If you add oil to the filter it helps like previously said

 

[old_blue]

I just run it for a minute before I do my oil. never have any problems

 

[Hardtop68]

I never get this sound... I always change the oil and filter with engine at normal running temperature...

Ric.

 

[JBushman73]

Dude!!!

You are so screwed. You just made chicken noodle soup of your pistons. You might as well have taken your pistons and beat them with a set of vice grips and a volcanic rock!!!

Not really. I've done the same. I hear this when I run synthetic. Its like water, and takes a few seconds to get mixed in real good and do its job.