AAP 10w30 1996 Buick Regal, 3.8L, 3034 miles

[The_Cams]

Advanced Auto Parts labeled motor oil (provided by Coastal Unilube), 10w30, 3034 miles on sample, 173224 total miles on unit. This is the Auto-RX Rinse cycle. Mixed city/highway driving, OCI was approx. 2 months on this oil.

Replaced the UIM & LIM gaskets at 144700 miles (about 30K miles ago).

Oil Analysis performed by WIX (Staveley Services).

Iron 5
Chrom. 0
Lead 9
Copper 4
Tin 0
Alum 1
Nickel 0
Silver 0
Silicon 7
Boron 15
Sodium 27
Magnes. 9
Calcium 1111
Barium 0
Phosph. 677
Zinc 823
Moly 9
Titan. 0
Potass. 0

Visc 40 N/A
Visc 100 9.16
Fuel N/A
Water 0
Coolant NO
TAN 1.6

Recommendations: No corrective actions required.

It appears the oil sheared quite a bit, and I was hoping for a fuel reading, but it was blank on this analysis. Over the winter prior to this oil change I replaced a bad fuel injector seal. Regardless, I'm happy with the numbers

Any thoughts??

 

[addyguy]

Calcium detergent level is really, really weak, w/o anything to 'back it up' - no Magnesium, very little sodium...

Lead is a lot higher than iron, which I have read meas the oil is too thin, and the bearings are suffering. But this is a rince, so hopefuly this will trend down...

You got a TAN, but no TBN? I thought the two kinda went hand-in-hand...TAN is fairly low, probably still below TBN.

 

[The_Cams]

Didn't request or receive a TBN. I agree, Calcium looks pretty weak. Replaced this fill with Maxlife 10w30, so that'll fix that

As for the Auto-RX, about 500 or so miles into the cleaning phase I noticed a nice increase in power. Good stuff.

 

[GMFan]

I really wouldn't use this oil for anything else other than an ARX rinse.....a dollar more is worth it to get a better oil like Formula Shell, Havoline or Exxon Superflo

 

[Gary Allan]

You sheared to a 20 grade. Without a flash point it's hard to figure what it's from.

The Pb may take a bit to really settle down. It's still at noise level though...

 

[The_Cams]

Staveley belatedly provided a fuel (% vol) of <1. That's nice to hear. Next time I'll request a flash point just to be safe. Thanks for the input.