RX8 seventh oil sample
 

2004 Mazda RX-8

Oil OEM Redline Redline Redline Redline Redline
5w20 5w20 5w20 5w20 5w20 5w20 5w20
Oil added 0 0 0 0 0 0 1
Miles on Oil 1250 1764 1500 1500 3000 4000 6581
Miles on Unit 1250 3014 4520 6067 9166 13221 19802
Date 12-13-03 12-30-03 02-09-04 03-24-04 06-04-04 08-30-04 02-15-05

Aluminum 9 5 5 10 6 6 7
Chromium 4 5 6 5 6 7 11
Iron 30 30 33 29 29 35 50
Copper 18 22 15 10 7 6 7
Lead 1 2 0 3 3 5 5
Tin 0 1 4 0 1 1 1
Moly 480 471 578 599 586 556 574
Nickel 1 1 1 1 1 1 2
Manganese 0 1 1 1 0 0 0
Silver 0 0 0 0 0 0 0
Titanium 0 0 0 0 0 0 0
Potassium 0 2 5 4 3 2 5
Boron 137 71 37 24 17 8 14
Silicon 42 28 21 17 15 15 15
Sodium 8 15 18 20 20 22 20
Calcium 1724 2421 2565 2841 2906 3394 2698
Magnesium 5 6 7 6 6 6 14
Phosphorous 850 1015 1084 1077 1091 1222 1183
Zinc 884 1236 1165 1236 1362 1371 1304
Barium 1 1 0 0 0 0 0

SUS Vis@210F 50.3 50.9 53.4 54.1 54.4 58.5 59.6
Flashpoint F 335 325 340 370 395 400 370
Fuel 1.5% 1.5% 1.3% .5 .5 .5 .5
Antifreeze 0 0 0 0 0 0 0
Water 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Insolubles 0.2 0.3 0.4 0.4 0.3 0.2 0.5

Uh, that is basically unreadable.

Could you put that in a spreadsheet or some other chart and post it as an attachment?

Better yet...bottom line up front...what does any of that really 'mean'? :)

It looks like the fuel in the oil has gone down since the first 2 checks.I only have 4K on my 8 and the dip stick has the foam on it of course and smells like gas big time.Im hoping less fuel will be in my oil as I get more miles.
Shark

theres a little engine wear (chromium & iron) as expected and redline oil has a crap more anti-wear additives in it then the factory fill (phosphorus & zinc)

http://www.blackstone-labs.com/gasol...port_expl.html

Vince

Import it into any spreadsheet if you want it easier to read.

Vince

I run Canzoomer's stage1/2 and that's when my dilution dropped.

Vince

It would be nice to read their comments from your latest report. Cr and Fe jumped on the last sample; did they have anything to say about that?

All looks mostly normal. They suggest that my rings may be wearing heavily and that I should decrease the interval between oils changes until it (iron) comes down.

Vince

Rings? You mean apex seals?

I keep telling people I don't have any pistons or rings :cool:

Craig

Interesting.....
 

Your Fe/Cr does look high for such frequent changes with expensive oil, could it be lots of driving in the high rev range? Did your driving style change at all? Lots of idling?

The silicon is high for that mileage, (should be in the single digits), and if the metal wear isn't from a radical style change, then the bad news is that the sand you are sucking is rapidly grinding away your engine!.....I would definitely be looking for an air leak, loose hose, or inferior aftermarket airfilter.

(Your viscosity readings are more consistent with samples measured at 210*F, not 210*C, possible transcription error?) ;)

S

The source of the iron and chromium could be the engine still breaking in plus the extended interval. I'll keep a watch on it.
No major changes in my driving.
The silicon is only two PPM above universal averages so it's not a problem.
The other thing that has a great effect on the data is how the sample is taken say at the beginning of the drain or the middle.
Your right it is F not C!

Vince

feeling generous tonight