Here's the latest UOA on my WRX.
Royal Purple 10W-30
5022 miles on oil
20,028 total miles
Pure One oil filter
OEM air filter
No make-up oil
Al- 3
Cr- 1
Fe- 4
Cu- 3
Pb- 2
Sn- 1
Mo- 134
Si- 4
Na-2
Ca- 2231
Mg- 5
P- 816
Zn-966
Viscosity 56.2
Flash 370
Insolubles 0.3
Fuel
Eat your hearts out GM owners.
Actually, I have a 1990 GMC K2500 which gets fed Delo 400 15W-40 and is driven less than 3000 miles on its yearly oil change.
I wasn't going to do an analysis this time, since it seems I had found a good match for the WRX. I noticed that the oil looked a bit cleaner this time, and consumption was half of what it had been (~4 oz.), so I was curious.
Wear is down a bit, and the insolubles are the lowest that I have seen so far. Looks like it's getting broken in.
The interesting thing is that the Mo and Ca numbers are about 25% higher compared the previous two intervals and the VOA. It looks like RP is tweaking their formula.
to Subaru and Royal Purple
Ed
Royal Purple 10W-30
5022 miles on oil
20,028 total miles
Pure One oil filter
OEM air filter
No make-up oil
Al- 3
Cr- 1
Fe- 4
Cu- 3
Pb- 2
Sn- 1
Mo- 134
Si- 4
Na-2
Ca- 2231
Mg- 5
P- 816
Zn-966
Viscosity 56.2
Flash 370
Insolubles 0.3
Fuel
Eat your hearts out GM owners.
I wasn't going to do an analysis this time, since it seems I had found a good match for the WRX. I noticed that the oil looked a bit cleaner this time, and consumption was half of what it had been (~4 oz.), so I was curious.
Wear is down a bit, and the insolubles are the lowest that I have seen so far. Looks like it's getting broken in.
The interesting thing is that the Mo and Ca numbers are about 25% higher compared the previous two intervals and the VOA. It looks like RP is tweaking their formula.
Ed