Pontiac GTP L67 3800, PP 5w30 4.6k

[ATS-V]

Code:


OIL PP5w30 GC0W30 GC0W30 GC0w30 GC0w30

MILES IN USE 4.6k 4.4k 4.3k 4.4k 4.6k

MILES 173.3k 164.8k 156.8k 152.5k 148.1k

SAMPLE TAKEN 1/23/09 8/2/08 2/9/08 10/27/07 7/21/07



ALUMINUM 3 2 3 2 3

CHROMIUM 1 1 1 0 1

IRON 13 12 14 12 17

COPPER 12 12 14 14 13

LEAD 8 18 14 22 19

TIN 1 0 2 0 0

MOLYBDENUM 50 3 2 6 18

NICKEL 1 1 1 0 1

MANGANESE 0 1 0 0 0

SILVER 0 0 0 0 0

TITANIUM 0 0 0 0 0

POTASSIUM 22 9 16 6 10

BORON 25 4 3 5 12

SILICON 7 8 8 7 9

SODIUM 48 23 35 19 24

CALCIUM 3267 2494 1896 1866 2013

MAGNESIUM 131 593 563 525 424

PHOSPHORUS 766 981 870 842 797

ZINC 1082 1251 1066 1082 1041

BARIUM 0 0 0 0 0





INSOLUBLES 0.3 0.3 0.3 0.4 0.3

WATER 0 0 0 0 0

FLASHPOINT ºF 385 405 415 415 395

SUS VIS 210ºF 31 66.9 67.7 66.8 67.7

cSt VIS 100°C 10.51 12.13 12.35 12.11 12.33




This interval was the 1st run with PP, driving was more short trips and colder weather than previous intervals.

This engine has been slightly leaking coolant for over 50k miles, but I've always felt that it had nothing to do with above average bearing wear. My very first 2 analysis' had some low levels of coolant and had some of the best wear numbers. Driving is very consistent, it's a daily driver. This car runs more boost than stock and has a modified PCM, and a cold air intake (K&N filter).

For more historical data see http://www.bobistheoilguy.com/forums/ubb...691#Post1216691


Question/comments welcome.

 

[WishIhadatruck]

I found that the PP helped with my 3800 bearing wear as well. I think I'm on my 3rd OCI of PP since I replaced my intake gasket last spring after a few dino runs. I've been somewhat hesitant to spend money on analysis lately but I'll probably get mine checked again this summer.

It looks like your coolant leak might be getting worse since both Potassium and Sodium are up a bit. I'd be careful, you don't want it to start gushing. Your wear actually looks pretty good considering the coolant leak.

 

[OVERKILL]

Keep in mind, coolant leaking into the crankcase on these engines can cause a sludge build-up that can starve the engine for oil.

 

[JoeFromPA]

Nice drop in Lead. Whats up with the viscosity ?

PP 5w30 seems to come back consistently positive in boosted engines with either [censored] stock setups for oil, or small problems, over 4000-5000 mile intervals.

I'm impressed with how it's done against GC 0w30, one of the favorites out there, considering the cost difference.

Joe

 

[ATS-V]

Originally Posted By: OVERK1LL
Keep in mind, coolant leaking into the crankcase on these engines can cause a sludge build-up that can starve the engine for oil.


With insolubles so low I don't thing it's an issue.

Originally Posted By: JoeFromPA
Nice drop in Lead. Whats up with the viscosity ?

PP 5w30 seems to come back consistently positive in boosted engines with either [censored] stock setups for oil, or small problems, over 4000-5000 mile intervals.

I'm impressed with how it's done against GC 0w30, one of the favorites out there, considering the cost difference.

Joe


Nice catch it supposed to be 61 not 31 SUS.

I did give GC a chance but it didn't do so good for me. Mobil 1 used to provided good results but then suddenly it wasn't so good right around the SM/E10 change. Keep in mind K and Na were always slightly present in these analysis'.

 

[OVERKILL]

You won't know if it is an issue unless you tear-into it unfortunately.

 

[JoeFromPA]

From everything I can see, you've got a consistently wearing engine over 30k miles of oil analysis and with modest improvement when switching to PP 5w30 (specifically in lead).

The car isn't worth repairing if it's got a pinhole leak that hasn't changed in 2 years/30k miles. Unless you are a DIYer and feel like doing it. Seems like you just need a robust oil to handle it.

If you want to try something different, how about Rotella T 5w40 synthetic?

Joe

 

[Bror Jace]

Hmmm ... might it be that the PP chemistry is better at counteracting trace amounts of glycol ... and THAT is the reason for the drop in lead?

 

[ATS-V]

Originally Posted By: Bror Jace
Hmmm ... might it be that the PP chemistry is better at counteracting trace amounts of glycol ... and THAT is the reason for the drop in lead?

I was wondering the same thing.

 

[Jaymus]

Originally Posted By: JoeFromPA

If you want to try something different, how about Rotella T 5w40 synthetic?

Joe


I'd have to agree with that. A HIGHLY robust oil, MEANT to take abuse, hold lots of 'dirt' and last many, many miles. There's a turbo charged car with drag strip trips that used Rotella Synthetic 5W-40 for 8,xxx miles that returned EXCELLENT results. Unbelievably, almost.

It's in my truck, now. So amazed by the UOA's of RTS.

 

[steve20]

was the PP part of an older stash?
Zinc & phosphorous look high by today's standards


Steve

 

[ATS-V]

Originally Posted By: steve20
was the PP part of an older stash?
Zinc & phosphorous look high by today's standards


Steve


No it was purchased at Walmart probably around Oct '08.

 

[vxcalais]

How would mineral Delo 400 Multigrade ro Delvac MX hold up is a situation like this ??? They seem very robust, but so does Mobil 1 and Redline wiht their high TBN's.

 

[ATS-V]

Originally Posted By: vxcalais
How would mineral Delo 400 Multigrade ro Delvac MX hold up is a situation like this ??? They seem very robust, but so does Mobil 1 and Redline wiht their high TBN's.


Not sure. I wanted to stay synthetic to keep things clean. If you look at the historical data, the wear started using M1 (SM).

 

[WishIhadatruck]

My wagon with the LT1 didn't impress me with GC in it. Currently I'm running Rotella 10W-30 in it. We'll see how that comes out in a few months. The person that recommended it suggested it would work better in my situation (not the same as yours) than the Rotella T 5W-40.

I'm sticking with PP in my Grand Prix for now. When I get my next UOA I'll decide to stick with it or try the Rotella in it also.