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Old 01-13-2004, 02:24 AM   #1
santofontana
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Member#: 26876
Join Date: Oct 2002
Chapter/Region: NESIC
Location: 1990 GMC Sierra 4x4 350ci
Vehicle:
1994 Camaro Z28 383
Black M6

Default UOA: Amsoil 5-30 5174 miles

2002 Subaru WRX Amsoil ASL 5w30 5174 miles

First numbers are from my (3) royal purple 10w30, (1) Castrol Syntec 10w30, and (1) Amsoil ASL 5w30 mix. Oil was in service for 3100 miles during mostly warm weather.

Second column is Amsoil ASL 5w30 run for 5174 miles mostly in cold weather. I had to work in the city for a while so there was lots of stop and go driving. It also took one pass at the 1/4 mile track. I put on a catless turbo back exhaust and a gutted uppipe at the begining of the OCI.

K&N drop in air filter and Amsoil SDF20 used both times.

RP 3100....ASL 5174
aluminum...3....2
chromium...1...1
iron.......7....5
copper.....2....2
lead.......0....0
tin........0....2
moly.......92....9
nickel.....0....0
manganese..0....0
silver.....0....0
titanium...0....0
potassium..0....0
boron......26....41
silicon....4....6
sodium.....3....2
calcium....2161....2200
magnesium..63....663
phosphorus.862....954
zinc.......946....1148
barium.....0....0

sus vis @ 210f.....64.0....64.0
flashpoint.........340....390
fuel...............1.5....<0.5
antifreeze.........0....0
water..............0....0
insolubles.........0.2....0.3
TBN.............n/a....6.9


Im glad to see the fuel gone and Im pleased with these results.
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Old 01-13-2004, 02:58 AM   #2
drees
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Member#: 25905
Join Date: Oct 2002
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2003 Silver Wagon
Tuned with Enginuity

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Numbers look great. You can definitely run that oil for a LOT longer. TBN is high, I bet you can run close to 10k on the Amsoil 5w30.

I think this is the first WRX Amsoil report I've seen, it looks perfect. And it gets pretty cold over there in Mass, too. Wear metals/mile are lower than in my car, and I don't have the cold you have there in Mass. Maybe I use the throttle more.

How many miles total on the car?

Here's my last results. I'll be up for another oil change in a month or two, we'll see if M1 continues to work well for me.
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Old 01-14-2004, 11:31 PM   #3
santofontana
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1994 Camaro Z28 383
Black M6

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There was about 38k on the car at the end of that oci. I think Im gunna go 7-8k on the amsoil series 3000 5-30 that I have in there now, I doubt it is worth the extra money over the regular 5-30 though. How far are you going on m1 this time 10k?

As far as driving goes, Im pretty hard on the car. This oil had countless street races and lots of redlining on it. I do make sure not to go into boost until its fully warmed up and I stay out of boost for the last few miles I drive too.
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Old 01-15-2004, 02:02 AM   #4
drees
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I am going to stick with ~7500mi on the M1 and make sure that the wear levels stay the same. I may have to try some AMSOIL as the wear numbers you've got look better than the wear numbers I had on my 5k mi interval.

Even your 3k mi interval looks better than my 3k mi interval, maybe it's because you've got more miles on your engine, or could just be manufacturing tolerances.

I also do my best to stay out of boost and keep RPMs down until warmed up (although I will admit to seeing a couple PSI when merging into traffic) as well as taking it easy the last mile or so home. It doesn't sound like I drive as hard as you, though.
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Old 01-15-2004, 02:42 PM   #5
bluesubie
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04 FXT

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Great report!
It's good to see people doing UOA's instead of saying "Amsoil rocks, it makes my car sound smoother and I swear I get more hp".

Definitely go for at least 7,500 mile intervals.

-Dennis
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Old 01-15-2004, 03:21 PM   #6
santofontana
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Join Date: Oct 2002
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Location: 1990 GMC Sierra 4x4 350ci
Vehicle:
1994 Camaro Z28 383
Black M6

Default

Quote:
Originally posted by bluesubie
Great report!
It's good to see people doing UOA's instead of saying "Amsoil rocks, it makes my car sound smoother and I swear I get more hp".

Definitely go for at least 7,500 mile intervals.

-Dennis
I agree, we could benefit from more people doing UOAs. Other car clubs compile their uoas together in a spreadsheet. Id definitely like to see more people do them. Id also like to see some STI uoas.
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