kjbu

Hi

3.2L VR6 engine has seriously problems with timing Chain as we know.
Recommended oil for this engine is 0-W40. Would a different viscosity reduce the risk of early timing chain problems?

My engine got New timing Chain at about 130k km ($6000 job), and want the New one to last longer.

Porsche didn't know about this problem when they choose 0-W40 as recommended oil.

hahnmgh63

If I'm not mistaken is the problem with the timing chain stretching? If so then the oil probably won't be a cure but I have no doubt that a better quality 5w-40 oil is better than the 0w-40 recommendations, usually Mobil 1 0w-40 due to Porsche marketing contract with them. At least in the U.S. they can recommend Mobil 1 due to their exclusive Marketing contract but they can not force you to use it. They must put out an oil spec that any oil meeting that spec then can be used and that is where Porsche has their list of oils.

kjbu

You are correct. Stretching Chain and a gear that wears out. Chain tensioners also wear out.
Oil With better lubrication should be good, but Chain tensioners are controlled by oil pressure from my knowledge. Maybe different oil viscosity could make those worse (or better).

An engine-expert opinion would be great ��

hahnmgh63

Probably have even more luck on a VW or Audi forum where they both used a lot more of the 3.2L engines.

wrinkledpants

I don't think so. That seems to be one of those issues that once it's been completed, the motor is pretty solid. Lots of VAG motors use the hydraulic tensioner setup. The 4.2 V8 that's in the Touareg and a bunch of other cars has that setup - and it's a fairly bomb-proof motor.

That said, M1 is probably the lowest performing oil on the approval list. It's barely a 40 weight, and it shears out fairly quick to a 30 weight, which is why you see so many cayenne drivers reporting 1 qt in 1K miles as normal oil consumption. If you're a stickler to the approval list - there are plenty of other oils that are readily available that will be much better for your motor.

I'd try Motul if you like the approval list.

If you don't care for the approval list, Shell T6 has been great for a lot of people. Stays in grade, tons of ZDDP anti-wear additives, and it's cheap and readily available. Redline has a new 0W40 oil that looks bomber, too.

DWPC

How can oil viscosity cause timing chain issue that takes 130K km to become a problem? How is it we don't see this reported more frequently if its a chronic problem on the base V6?

Douglas61

Can we easily get Motul or Redline easily at Pepboys or Auto Zone? Thanks!

Kirill

Necrotread, but what can be easier than ordering it online: https://www.ecstuning.com/b-motul-parts/