It's a metric head. Just about everything in the JK is metric.

 

13mm

 

13 mm yah sorry to tell you that autozone sells them for like 5 dollars around there, replaced mine because the dealership uses impact wrench and beat the hell out of it when I was getting my free oil changes. Once I started doing them I stripped the bolt so I bought a reverse socket set. learned my lesson if it has been done by the dealership in the past replace it while you can.

 

Oil drain valve systems are pure win. Never mess with a bolt again. Several types of systems available.

 

17mm

 

Thanks all, you've confirmed what I thought to be true. I just wish I had something official from FCA-Jeep that states the drain plug is in fact 13 mm.

I had a service manager and three techs telling me that the plug was 1/2" and my use of a 13 mm rounded off the head. I contend that their use of a 1/2" socket coupled with over tightening compromised the integrity of the head, then I stripped it with a 13 mm.

I know we aren't talking big $$$ here I just hate incompetence with the simple stuff. Then to tell me "our stuff is standard" exact quote from the service manager, when I know that the lug nuts are 19mm, the soft top bracket bolts are 10mm and the oil filter housing is 24mm just makes me want to prove the point even more.

I'll keep my fingers crossed that someone can direct me to a Chrysler spec.

 

It's pretty clear to me, that an M14 bolt is metric, unless I missed something in the last 65 years.

Mopar 6507741AA Oil Drain Plug, M14x1.50x21.50 for 07-18 Jeep Wrangler JK

 

Reason #59276 I don't have my oil changed by "professionals".

Also why I installed a Fumoto valve. I hook up a hose and drain the oil right into a jug.

 

I started changing my oil after my 4 free ones were up and noticed that the dealer had started to round my drain plug. I've contemplated getting the Fumoto but just might do it as I change my oil every 5k and I have one coming up in about another month.

 

Don't take it back there for service!!!

 

I have 2018 unlimited sport. I looked as you did all say 13mm. The minute I put on plug I thought it seemed loose but used anyway, rounded some so I stopped and used 1/2 which is the correct size.
Don’t know what’s going on but to anyone if u feel any looseness stop.

 

Welcome to the Forum!

I'm with you on this one. I just did my yearly oil change last night. I always use a 6-point 1/2" socket. I feel the 13mm socket is a little loose. The 6-pt 1/2" socket fits perfectly, although it took a little wiggling to get the socket off of the drain plug after torquing to 20 ft-lbs.

 

13 mm is the proper size. The bolt has a metric thread pitch (M14x1.50), so it's no surprise that the bolt head is also metric.

 

Let me guess, cheap Chinese tools?

 

What many seem to forget is the fact that drain pugs are intentionally made of soft material to avoid stripping the threads in the drain therefore it is necessary to use only 6 point tools to remove and replace and in this case 13mm. BUT, in most cases 1/2" will work fine since 1/2" is less than .012" smaller than 13mm. With either, 6 point is the correct tool for the job.

 

12-point sockets are for 12 point bolts and 6-point sockets are for hex bolts.

 

Welcome to the forum