VW Passat 1.8t 2001 10k PYB 5-30 spun bearing

[zanzabar]

Soliciting oil recommendations: what can I use to bump up the hot idle oil pressure which is triggering more frequent low pressure warnings lately with the weather heating up?

I'm considering 1) 15w40 HDEO, 2) 10w40 Redline, 3) Mobil1 15w50

 

[OVERKILL]

Try #3 first and see how much higher it goes. You can always step it down to #1 (or a 5w-40).

 

[tiger862]

First sign is low oil pressure at idle when hot. At that time you will hear valve clatter and or knocking then at that point you will know that metal is getting spread through out engine. I have ran some like that for short times with changing filter once a month to get metal out until I could find used engine. You can use heavier oil but again it is prolonging problem.

 

[zanzabar]

1000 miles after rebuild : this OCI was on 50% G-Oil 5w30 and 50% VPB 15w40, plus about 4oz Lucas oil treatment to bump up the viscosity (didn't seem to help?).

The numbers on the left were from the fill that was in it when I got the non-running car, the numbers on the right are after about 2 drain and fills following the engine rebuild and 1 more drain and fill following the oil pump replacement and oil pan cleaning. I then drove it about 900 miles in mostly short-trips.

My hope is that this engine is still wearing in post-rebuild and that the next 1000 mile OCI will show a significant downward trend in iron and aluminum. Who knows though, the worn cam journal that was 'repaired' might just sieze up again.

I'm also experimenting with what oil weight I need to avoid hot idle oil pressure warnings. Looks like at least 13 cst100 or so since I was still getting down to about 10psi at hot idle with this fill (11.3 cst100) and it was triggering the warning? But I'm leaning towards Redline 10w40 for my next fill anyway which is well over 14, or RT6 + some Lucas.

Code:




Mileage 174k 175k

OCI 10k 1k

Oil PYB 5-30 Zblend

ALUMINUM 12 13

CHROMIUM 2 2

IRON 56 28

COPPER 15 4

LEAD 2 1

TIN 8 3

MOLY 85 61

NICKEL 2 1

MANGANESE 1 2

SILVER 0 0

TITANIUM 0 9

POTASSIUM 4 0

BORON 39 89

SILICON 26 18

SODIUM 14 12

CALCIUM 2276 1746

MAGNESIUM 15 393

PHOSPHORUS 816 900

ZINC 963 1033

BARIUM 1 0



cSt100 9.52 11.27

SUS Visc 57.6 63.8

Flash°F: 400 405

Fuel %:
Coolant%: 0 0

Water%: 0 0

Insol%: 0.3 0.3

TBN: ? ?

 

[Jdun]

I know this is reviving an old post but did you ever find an oil that improved you "low idle pressure numbers"?

 

[Jdun]

Disregard, found your second thread on my next search

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2942719&page=2

 

[crazyoildude]

those engines are trouble prone we see a lot of them

 

[zanzabar]

About to send in my next 1000 mile OCI sample. Hoping for significant downward trend in all the wear metals. Been using Lucas additive to increase the viscosity and yes it seems to help. Added about 1/3 bottle (10oz) and it bumped hot idle pressure up about 1-2psi, added another 1/3 bottle and it went up some more. The Z-blend mix I have in there now is probably about a light 40wt, so I'll probably go with RT6 next and see if that works.

 

[zanzabar]

Finally got my sample analysis back. This fill was mostly 15w40 Valvoline Premium Blue (about 3qts, plus 1qt G-Oil, plus about half bottle ~12oz of Lucas oil stabilizer). Things are certainly getting better. I guess I agree with Blackstone's comments that aluminum could be lower.

Frantz bypass filter was installed about half way through this OCI. Oil was drained from the sump and I refilled with Rotella T6 and plan to go about 3,000 before sampling again. I am very encouraged by the Insolubles number, and attribute that to the Frantz filter doing its job.

Where'd the titanium come from? I believe the silicon is from sealants and the silicone PCV kit I installed when I rebuilt the engine so I don't think it's from an air intake leak.

Code:




Mileage 174k 175k 176,200

OCI 10k 1k 1200

Oil PYB 5-30 Zblend Zblend

ALUMINUM 12 13 6

CHROMIUM 2 2 1

IRON 56 28 11

COPPER 15 4 3

LEAD 2 1 1

TIN 8 3 0

MOLY 85 61 43

NICKEL 2 1 0

MANGANESE 1 2 1

SILVER 0 0 0

TITANIUM 0 9 13

POTASSIUM 4 0 2

BORON 39 89 33

SILICON 26 18 16

SODIUM 14 12 6

CALCIUM 2276 1746 1363

MAGNESIUM 15 393 345

PHOSPHORUS 816 900 798

ZINC 963 1033 906

BARIUM 1 0 0



cSt100 9.52 11.27 14.05

SUS Visc 57.6 63.8 74.2

Flash°F: 400 405 410

Fuel %:
Coolant%: 0 0 0

Water%: 0 0 0

Insol%: 0.3 0.3 TR

TBN: ? ? ?




Blackstone's comments:
Things look a little better after this 1,200-mile oil run, but aluminum and silicon could stand to read lower. We won't complain too much since this is the lowest both have read in the sample history, but we'll look for them to continue this trend in the next sample. It may not be a bad idea to double check the air intake/filter for any leaks that might allow unfiltered air into the engine. The viscosity was thick, mostly from the Lucas, but that's okay. No contamination was found and insolubles only read a trace. Once things clear up, a normal interval is an attainable goal.