Spark Plugs! - This belongs in the oil forums!

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rw19

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So we have beat the old mobil 1 vs castrol vs pennzoil to death, I have a new topic for the BITOG crew. Do you change your oil after you do your plugs?

I always do I don't want the crud going into the block and recrulating till the pesky filter gets to it.

Chime in, I have yet to find any topics like this on the internet. I know a lot of us soak our plugs in penetrating fluid to get them out easier, this also drips into the oil. Penetrating fluid is more solvent than a lubricant, and do you guys use never seeze after you install the plugs? I used too, but then again that probably seeps into the oil as well and god knows whats in that!
 
I dont see how they are related....

We are taking about 5-10k OCi versus atlease 80k with good plugs....


There isnt need for penetrating oil unless the car has been neglected.... Pen oil inside the combustion chamber wont effect the oil that much, unless you dump a whole can of pen oil in there.... most of it comes out with a few sparks.
 
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I had to look up my maintenance log. I did spark plugs and oil on a Mercedes in the fall.

Thankfully, I did the spark plugs 200 miles before the oil change (I couldn't remember), so I suppose I need not worry.

I certainly didn't use any penetrating fluid to loosen the plugs. I didn't use any anti seize either (I did torque) as most Mercedes forums recommended against anti seize.

The threads of my plugs had what appeared to be light layer of black all over them. I guess it's the blow by from combustion? I saw pictures of other people who did plugs on Mercedes and all the threads looked the same, black. However, they looked great otherwise at 46,000 miles.
 
Most anything that somehow got carelessly into the cylinder would be expelled out an exhaust valve the second you started the car.

Most penetrating lube is highly volatile, and as soon as anything got hot it would boil off and get burned up.

Also worthwhile to note that most plugs are shipped with anti seize already on them. Aluminum heads are pretty much old news these days!
 
Most oems tell you NOT to use any kind of anti-seize on the plugs nowdays with fear of them not holding torque and loosening.

I don't normally even worry about the oil after a plug change as the others have stated. Very little if anything should fall into the comb. chamber and whatever does will disappear as soon you fire the engine. If you have stuff getting into the oil that easy you have some serious ring problems my friend!!
 
I blow the crud, if any off the threads with shop air, just before I take the plug out. If in the unlikely event crud gets into the cylinder after that I would imagine it would quickly be blown out on the exhaust stroke. I never saw crud on the plug itself that could fall into the cylinder. Then the crud would have to make it past the rings to actually get into the oil. I'd be more concerned with scratched cylinder walls to be honest, but with the shop air trick I think that's a moot point as well. Also if you change your plugs every 50K miles and you'll do a few oil changes before you change your plugs anyway. Step it up to 100K plug changes, or increase the OCI, you get the picture.
 
rw19, As has already been pointed out any excess thread lube or penetrating oil will be burned immediately upon starting the engine and has about zero chance of getting past the piston rings, and into the crankcase, anyhow.

The reason you haven't "found any topics like this on the internet" is because there is no basis in fact for your premise. It's a complete fabrication.

Come on, give us a real topic to discuss.
 
I blow the crud out of the spark plug holes and do not require spray to loosen anything up.

A non-issue at this house.

OP is a new guy trying to be relevant on the site.

1/10 for trying.
 
Originally Posted By: bigt61
I like to change my oil when I rotate my tires just in case I accidentally get a lug nut in the oil.


laugh.gif


All joaking aside! I don't think the OP has anything to worry about.
smile.gif
 
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I use shop air to blow any dirt that may have built up around the plugs before I remove them. Changing oil after replacing the plugs is a new one on me. Ford recommends the use of penetrating oil when removing plugs on some of the newer V8's as the plugs can break off in the plug hole or strip the threads in the heads when being removed.
 
Originally Posted By: rw19
Penetrating fluid is more solvent than a lubricant,


Actually, I believe it's just a low viscosity oil. Some brands may include a solvent component though.

I have only used penetrating oil once on a highly neglected Excel or Accent. The owner hadn't opened the hood in years and the engine was corroded from the salt used in multiple winters. It was not fun.
 
Originally Posted By: rw19
Do you change your oil after you do your plugs?

NO!
 
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