'02 Subaru WRX Redline 10w30

[buster]

Great report in a great engine. Yes, I think the differences are from the lab, mainly TBN.

 

[Palut]

This is a great report. How hard do you drive this car?

 

[Quick_lude]

That's a lot more calcium on the last report. Viscosity is all over the place too. Interesting how different labs produce such varying results.

 

[harrydog]

The viscosity differences are because the first UOA was 10w40, the second was 4-qts 10w30/1-qt 20w50, the third and fourth were both 10w30.
I drive this car moderately hard. It sees 7000 rpm fairly regularly as well as highway miles and around town short trip miles. A little of everything.

 

[Al]

In general I put stock in Blackstone. And we know that amount of Moly is about right. The trends are in the right direction. The only thing that could be better is the insolubles. But otherwise looks good to me.

 

[harrydog]

Here's the fourth UOA I've had done on this engine. All have been with Redline oil. The first three reports are from Oil Analyzers Inc. and the current one is from Blackstone. I'm waiting for the Dyson analysis. The current report is listed last. This UOA is for Redline 10w30 used for 5012 miles. The car has 45K miles total.


iron....................4/2/3/5
chromium................0/0/0/1
Lead....................3/7/7/6
copper..................7/7/6/4
tin.....................1/6/7/1
aluminum................2/3/3/2
nickel..................0/0/0/0
silver..................0/0/0/0
silicon.................13/9/8/11
boron...................1/1/1/5
sodium..................15/28/41/26
magnesium...............12/10/12/5
calcium.................2524/2691/2535/3433
barium..................0/0/0/0
phosphorus..............1181/1150/982/1196
zinc....................1352/1301/1302/1215
moly....................410/380/275/428
titanium................0/0/0/0
vanadium................0/0/0/na
potassium...............0/0/0/2
fuel.................... vis @ 100c..............14.35/12.31/10.80
water...................0/0/0/0
glycol..................neg/neg/neg/neg
TBN.....................5.75/5.57/4.43/2.3
oxid....................31/29/29/na
nitr....................26/25/24/na
flashpoint..............na/na/na/405
sus viscosity @210 F....na/na/na/63.1
insolubles..............na/na/na/0.4

I wonder if some of the obvious differences are due to the different laboratories?

[ July 26, 2004, 01:12 PM: Message edited by: harrydog ]

 

[Santo Fontana]

I guess we are so used to seeing high lead in redline uoas that we dont comment on it any more? And this car has been on RL for a while.

 

[Schmoe]

Wow. Can anybody say calcium, moly and ZDP? Man, that oil is loaded to the gills. Wear numbers look good. Just wish this oil wasn't so expensive or I'd try it.

 

[supraturbo]

I don't understand the excitement over this oil. TBN of 2.3 with only 5k miles? Also
I have seen several reports with more miles and much less bearing wear. Enlighten me I don't get it espcially when you consider the cost of this oil.

 

[harrydog]

Looking for opinions here.
Even though I'm really sold on Redline and have been using it for years, I'm thinking that I'll switch to something else at my next change, just to see how another oil compares to Redline in this engine. I'll post the results.
I'm not sure what I should use though. I'm thinking maybe German Castrol. Or possibly one of the Amsoils, but which one?.
Since I'm using Redline 10w30 now, should I stick with a 10w30 to make the comparison as equal as possible? I wouldn't want any differences that show up to be attributed to the viscosity difference - I want this to be a brand to brand comparison.
Suggestions appreciated.

 

[buster]

GC, Amsoil ATM 10w-30 or M1 10w-30 would be ideal for comparisons. If you look at most Subaru UOA's they are all good. Not trying to knock RL(I do that enough) but the only good RL UOAs have been Subarus/Toyotas/VWs which show good numbers on any oil. I think RL is a good choice for your car but not sure if I'd use it over a lower cost alternative.

 

[Jay]

I'd like to see the comparison between Redline 10w-30 and Mobil 1 10w-30 just because M1 is the most widely available and popular synthetic.

Were all these reports 5kmi intervals?

 

[harrydog]

Yes they were all 5000 miles +/-

 

[harrydog]

I'm thinking I'll go with GC or Amsoil.
But I'm confused about Amsoil's products.
What's the difference between the ATM 10w30 and the XL-7500 10w30 other than the ATM is for longer drain intervals? Is the ATM a better oil in general, or is it just loaded up with additives that allow longer drain intervals? I don't do long drain intervals, so that aspect doesn't matter to me and I see the XL-7500 does better on the Noack Volatility test.
Is the ATM still the better oil even if it will be changed at 5000 miles?
Is there a spec sheet available on GC?

 

[Patman]

quote:

---

Originally posted by harrydog:
I'm thinking I'll go with GC or Amsoil.
But I'm confused about Amsoil's products.
What's the difference between the ATM 10w30 and the XL-7500 10w30 other than the ATM is for longer drain intervals? Is the ATM a better oil in general, or is it just loaded up with additives that allow longer drain intervals? I don't do long drain intervals, so that aspect doesn't matter to me and I see the XL-7500 does better on the Noack Volatility test.
Is the ATM still the better oil even if it will be changed at 5000 miles?
Is there a spec sheet available on GC?

---

The ATM is a true synthetic, using PAO/ester base, while the XL series uses a hydrocracked base. The ATM has a better additive package for longer drains too.