ronjenx

Come to think of it....
Could be. There are two different style rods used. The difference is how the caps are designed and installed. There can be both styles on the same engine.

I haven't looked into what the physical difference are, though.

sixty5vdub

Interesting.......... If somebody can post up what exactly the differences are, I will take a look at my 3.8L and see if this was a contributing factor.



Anthony

ronjenx

From the FSM:

"NOTE: The 3.8L may have any combination of forged or cracked cap connecting rods. The cracked cap design is easily identified by the connecting rod cap bolts rather than the traditional forged connecting rod cap nuts. The cracked cap design also has a different tightening procedure and specification. The connecting rod caps must be paint marked or scribed to identify the accompanying connecting rod. All connecting rod caps ARE NOT inner changeable between connecting rods."

"The connecting rods have either the standard forged caps or forged cracked cap design. Both the cracked cap and forged cap connecting rod designs are interchangeable and may be found in any combination when mounted to the crankshaft."

Reiper

Really started noticing it getting excessive around 16,000 and has steadily gotten worse, yeah it has always consumed oil just thought it was burning the 5w-20, even got paperwork from Chrysler through the dealer that states a quart per thousand miles or something like that

Slightlymodified

My 08 is starting to use more and more oil. at 13,000 miles it was down a couple quarts at my oil change with 3000 miles on the oil. Now it is using closer to 3 and the dealership says this is normal? They did find the intake gasket leaking, but my whole motor would be covered with that much oil leaking. My old 70 Blazer with over 200,000 miles on it burns less oil than my Jeep. I don't understand how a quart every 1000 miles could be considered normal.

ronjenx

That's the thing. People keep using the word "normal".

It's not normal, because most engines across the board don't use that much.

All the "1qt/1,000 miles" represents is the limit before the manufacturer will consider doing anything about it.
If people could get away from the word normal, maybe they wouldn't be so pissed off at the manufacturers' attitudes.

OoPEZoO

Right.......its not "normal" at all. I bought my JK brand new so I know everything that has been done to it since I drove it off the lot with 16 miles on it. I'm at 38k miles now and I'm not burning a drop of oil between changes of 6k-8k miles (mostly highway miles). I'm running standard 5W-20 non synthetic Castrol

My 1986 BMW 325 uses a quart of 15W-50 every 1500 miles, but it has ~245k VERY HARD miles on it with absolutely no engine work what so ever. That much oil consumption on a modern engine is just absurd.

racin444

I have the exact same thing going on with my 08! I got bored and wanted to check my oil at 30,000 miles. Just did an amsoil oil change at 22,000 and I burned through 3 quarts of it. I never rev my engine past 2,000 rpms before I shift to the next gear. I drive mostly city 90% of my JKs life. I also make sure the air filter is clean every 2,000 miles. I had 2 guys in the Jeep driving down the road and I gave it some gas and it was appearant there was oil burning out the exhaust.

This is so ridiculous that I burn through half the oil during an oil change interval with synthetic, I cant even begin to explain my frustration! I go in Thursday to begin the oil consumption test.

turner7205

I would say my 09 JK X is about 1qt for every 6k. I have taken it in a few times for a "top off" since they say its normal and they have never gave me an issue with coming in just for that. I had a 97 Civic that burned 1qt per 1k. Honestly a big factor of me buying a BRAND NEW vehicle was because I was sick of dealing with having to always top off my oil. I know 1QT for every 6k isn't much compared to what some of you guys/gals are facing but I hope it doesn't get much worse.

Reiper

I 've contacted Chrysler the lady acted like since I had the extended warranty that this was no big deal since it will be covered and not out of my pocket or theirs.

I've also sent a few e-mails to different people one was the guy that Wayoflife posted his e-mail in his thread about Chrysler voiding warranty. The other was to the Editor of a Off-road magazine who helped me out before when I had my mysterious squeal that nobody could find, that ended up getting me 4 engineers sent to the dealership where I bought the Jeep so they could perform 6 or was it 8 hours of disassemble / reassemble with my Jeep.