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VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old November 18th, 2018, 17:36   #1
McGuillicuddy
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Default Oil consumption: 1qt per 4500 miles. Concern or no?

No other symptoms. No major leaks. No significant smoke of any color. Car is a bit stinky at idle but I don't think it's out of the ordinary for an ALH (is it?).

Car is driven 80-90% highway, although I do drive it a pretty spiritedly most of the time.
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Old November 18th, 2018, 18:27   #2
ToxicDoc
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1 qt? I'd be happy to lose that little.
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Old November 18th, 2018, 19:36   #3
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No, it is a major biohazard.

Please have it in front of the crusher tomorrow morning by 08:00.
There will be a warrant out for you if you do not meet the deadline.

Seriously, why do people ask questions like this?
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Old November 18th, 2018, 20:45   #4
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Seriously, why do people ask questions like this?

Because some of these cars "burn no oil" and remain at fill spec between 10k mile oil changes? Because the idea that burning oil could indicate a brewing engine failure is not unreasonable?
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Old November 18th, 2018, 21:32   #5
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most major manufacturers' spec is 1qt/500 miles before they'll do anything about it
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Old November 18th, 2018, 21:35   #6
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Quote:
Originally Posted by Prairieview View Post
No, it is a major biohazard.

Please have it in front of the crusher tomorrow morning by 08:00.
There will be a warrant out for you if you do not meet the deadline.

Seriously, why do people ask questions like this?

A little harsh, don't you think? It was a simple question.
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Old November 19th, 2018, 05:14   #7
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Check the back of your engine you may not be burning so much as leaking it. The valve covers on the alh are notorious for leakage, especially from the rear coating the back of the engine.
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Old November 19th, 2018, 05:34   #8
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mine has 300k+ miles on it with original, untouched turbo. in the last couple of years I've noticed the oil goes low between oil changes. I probably should watch a little more often now. This is a big contrast with gasser VWs that I had in the past which always needed topping.

I think it is a moderate concern. I'd worry about the seals in the turbo so perhaps search around for advice on how to check it. Best I can think of is to take sound shield off the bottom and then open the air intake connection to see if oil spills out (on mine there is no volume of oil, but there are drips).
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Old November 19th, 2018, 05:44   #9
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Mine used to consume near-zero oil over a 10k mile interval.

Now it does consume some. A small amount leaks (back of the valve cover-to-head area, as with many) and since the gasket is not replaceable on the cover I've done some RTVing there, but it still does leak a small amount. The rest is likely going down the valve guides since when I pull the lower charge air pipe there's only an oily film and no build-up in there.

Since the cam and visible surface of the lifters looked fine at last timing belt interval I left it alone. Next time around (engine has ~250k on it) I'll likely pull the head and have it reconditioned, along with doing the oil pump drive since a failure there can be catastrophic. If the turbo continues to bypass almost no oil and still has no problematic play in the shaft I'll leave it alone. I might also buy a replacement valve cover (so as to get a new, and non-leaking gasket.)
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Old November 19th, 2018, 07:02   #10
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That sounds like alot cause i run 10k mile changes with no top ups! 175k miles with stage 4. But hey if the other guys say your cool roll with it, mine is a bew, the ALH may be different ive never owned one of them.... Oh btw maybe you need some better oil, I am an amsoil dealer..............
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Old November 19th, 2018, 08:07   #11
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Thanks everybody for responding (except that one guy). I should mention that I am using Rotella T6 5W40 and use a 10K km (6250miles I guess) oil change interval. I haven't sent it in for a UOA but I might do that soon. I also have not yet checked the intake for oil so I will do that ASAP.
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Old November 26th, 2018, 10:07   #12
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I’d check the back of the valve cover as well. The “built in gasket” in the valve cover becomes built in plastic in short order, then leaks all down the back of the block.
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Old November 26th, 2018, 12:20   #13
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How many kilometers on the engine? As these engines wear they tend to lose a little oil through the valve guides and seals when the car sits. They burn it off when you start up, usually making a puff of blue smoke.

A quart in 4,500 miles isn't ideal, but it's not terrible, especially if you have over 250K miles on the car. All my TDIs, except for the brand new ones, have used a little oil between changes. But I agree to look for leaks. That may be what you smell.
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Old November 26th, 2018, 15:48   #14
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How fast are you driving it to use that much oil. Oil consumption is often relative to speed and how hard you drive it.
I had a Nova that would burn a quart every 1500mi at 65-70, however, it used a quart every tank running 75-80.

My ALH might burn, vent through pcv a quart per 10,000 mi interval. I usually don't run over 75 and 65-70 on average leaning towards 75, occasionally 80-90, or so to pass, or maybe just because
I would guess at an 80 average it might increase a bit.
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Old November 27th, 2018, 08:45   #15
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Quote:
Originally Posted by IndigoBlueWagon View Post
How many kilometers on the engine? As these engines wear they tend to lose a little oil through the valve guides and seals when the car sits. They burn it off when you start up, usually making a puff of blue smoke.

A quart in 4,500 miles isn't ideal, but it's not terrible, especially if you have over 250K miles on the car. All my TDIs, except for the brand new ones, have used a little oil between changes. But I agree to look for leaks. That may be what you smell.
My car only has 136K kms on it (85K miles). I drive the car daily (75miles round trip, all highway) but it obviously spend a lot of time sitting unused in its past until I bought it earlier this year. It was literally owned by a little old lady and her husband (until he died - which I can see from the service records when the name changed from his to hers ).
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