use search and type sludge.
there are 100's of different posts.

V6 to answer the motor question.

 

Add Toyota to the search if you want to hread some ideas on what's going on in some engine designs.

 

The engine in my Mom's Sienna sludged itself to death. I think the mechanic said it was the design of the oil baffles [sp?]. It was all covered by Toyota. Needless to say, they handled the situation much better than VW. :banghead:

Mike

 

basically, vw messed up and didn't require (from the beginning at least) that the 1.8t's use synthetics. now, vw requires vw 502.00 oils every 5k.

what happens is that after the car is shut off, the oil "cokes" inside the oil lines for the turbo.

 

^^Not only that, they also decided to mount the motor the wrong direction, which required making the sump smaller. The car only holds about 4 quarts of oil, just about 5 with the big filter. Turbos are notoriously difficult on oil due to the temps at which they operate. For further reading, go to http://www.bobistheoilguy.com.

 

basically, vw messed up and didn't require (from the beginning at least) that the 1.8t's use synthetics. now, vw requires vw 502.00 oils every 5k.

what happens is that after the car is shut off, the oil "cokes" inside the oil lines for the turbo.

Yup. I'll bet if everyone had used synthetic oil from Day One and changed it every 3k mi / 5k km (city driving) to 6k mi / 10k km (highway driving), we never would have heard the word "sludge" in the same sentence as "1.8T" or "Passat."

 

^^Not only that, they also decided to mount the motor the wrong direction, which required making the sump smaller. The car only holds about 4 quarts of oil, just about 5 with the big filter. Turbos are notoriously difficult on oil due to the temps at which they operate. For further reading, go to http://www.bobistheoilguy.com.

Longitudinal is not necessarily the "wrong direction," but the sump is indeed 20% smaller than that on a Jetta 1.8T. If a 5k mi / 8k km OCI is correct with a 5-qt. sump, a 3.5k mi / 6k km OCI would be about right with a 4-qt. sump, but no such adjustment was made in the owner's manual.

 

^^ I was kidding, but turning it the other direction changed the sump size, which was a really stupid move. Great "engineering" on VW's part.

 

Longitudinal is not necessarily the "wrong direction," but the sump is indeed 20% smaller than that on a Jetta 1.8T. If a 5k mi / 8k km OCI is correct with a 5-qt. sump, a 3.5k mi / 6k km OCI would be about right with a 4-qt. sump, but no such adjustment was made in the owner's manual.

On the '06 passat 2.0t, it's only got a 4.4qt sump, with oil changes every 10k after the first 10k.

 

^^ I was kidding, but turning it the other direction changed the sump size, which was a really stupid move. Great "engineering" on VW's part.

ummm, the engine was adopted to the Jetta/Golf from the A4/B5, not the other way around.

 

On the '06 passat 2.0t, it's only got a 4.4qt sump, with oil changes every 10k after the first 10k.

Yes, I noticed that on my friend's 2006. Note, however, that the fine print in the manual still says that severe service driving will require more frequent oil changes. I am sure the 10k mi or 15k km interval is fine for highway cruising, but I would still cut it in half for city driving.

 

^^ I was kidding, but turning it the other direction changed the sump size, which was a really stupid move. Great "engineering" on VW's part.

The 1.8T started in the A4 in 97, and was moved to the Jetta/Golf platform midway through 99....so actually it was great engineering on VW's part because they did make it better.

 

^^ Must have been having a brain cramp last evening. I know it started in the A4. Regardless, the sump is just too small for this thing.

 

lets be honest.

VAG 1.8t sludging happens because people dont know how to take care of a turbocharged car. period.

and by the way, if its wasnt for longitudinal engines we'd be stuck with the crappy haldex AWD system. :banghead:

 

Yes, I noticed that on my friend's 2006. Note, however, that the fine print in the manual still says that severe service driving will require more frequent oil changes. I am sure the 10k mi or 15k km interval is fine for highway cruising, but I would still cut it in half for city driving.

isn't that note in the b5 manuals also? in any event when i get my 2.0t, i'm going to change it every 5k to be safe.

 

isn't that note in the b5 manuals also? in any event when i get my 2.0t, i'm going to change it every 5k to be safe.

in my manual it says to do turbo cooldowns after hard driving.

 

what about W8 sludging? All this talk , im scared. However, I think the manual has always called for synthetic, and Im pretty sure (read: hope) the previous owner had it done properly.... Is there any danger?

sorry for If i hijacked...bad form

 

what about W8 sludging? All this talk , im scared. However, I think the manual has always called for synthetic, and Im pretty sure (read: hope) the previous owner had it done properly.... Is there any danger?

sorry for If i hijacked...bad form

Your oil isn't exposed to the high temperatures of the 1.8 that can cause lots of coking. You shouldn't have a problem, especially since the design is a derivative of the VR6 which doesn't have sludge problems. Only time will tell for sure though, just take good care of your investment.