Why not reuse the oil drain gasket?

[Joebklyn]

Why do some feel it is necessary to use a new oil drain plug gasket?

[TrdSpeed140]

maybe they're paranoid and just want peace of mind. I, though, have been reusing the factory one for the past 70k miles. i think im gonna get a new one though on my next oil change.

[dorman68]

I still have the original gasket on my car after 6yrs(69,000 miles), have zero leak issues.

[Raddman04]

Have 142K on mine and switched to a magnetic at 70K. been using it ever since, it's a permanent fixed washer anyway, you have to be careful with your tranny drain plug the gasket can come off just by setting it down, it fell off on me and I didn't know it and it started leaking, found the old gasket on the ground days later!

[InfInIty13X]

The gasket can deform over time with repeated torquing/untorquing (especially when you put different amounts of torque on it) and create an uneven sealing surface.

[W6e6s6W]

I haven't had one for 30k. I don't over torque it (or use a torque wrench) but mine is completely dry from top to bottom (except around the intake manifold) haven't gotten around to replacing the gasket yet.

[Yuko]

The problem with the copper crush gasket is after years of reuse, it is crush to the thickness of aluminium foil. I have to cut a few of drain plugs before and copper gasket are recommaned for one-time use anyways. I use nylon/plastic gasket and only replace them if they leak or cracked. Never like the rubber ones.

[Chris D.]

I have the factory drain plug gasket, never a leak at 160K+
If it's not broke.............

[bionictony]

i think the oem washer can be used for more than 100K miles. it's aluminum with a black type paper on both ends. my experience is i've worked on a 05 camry since new and it's on its original gasket. now at 125k miles. i've done every oil change on that car. i've also done oil changes on a 07 corolla since new and now it's at 50k miles. if you let different people work on the car then i suggest getting a new washer every time. some people will over torque it.

[devinsdad]

Because they are cheap enough not to force to make last. The gasket deforms when you torque the drain plug on it. It's a one time use item. Theres no sense in forcing it to do more than it should. Cut corners on expensive items...not ones that cost less than a buck.

[gsmeljr]

07 CE/126,000, still using OEM, no leak.