2004 Mazda RX-8

Oil OEM Redline
5w20 5w20
Oil added 0 0
Miles on Oil 1250 1764
Miles on Unit 1250 3014
Sample Date 12/13/03 12/30/03

Aluminum 9 5
Chromium 4 5
Iron 30 30
Copper 18 22
Lead 1 2
Tin 0 1
Moly 480 471
Nickel 1 1
Manganese 0 1
Silver 0 0
Titanium 0 0
Potassium 0 2
Boron 137 71
Silicon 42 28
Sodium 8 15
Calcium 1724 2421
Magnesium 5 6
Phosphorous 850 1015
Zinc 884 1236
Barium 1 1

SUS Vis@210C 50.3 50.9
Flashpoint F 335 325
Fuel 1.5% 1.5%
Antifreeze 0 0
Water 0.0 0.0
Insolubles 0.2 0.3

Interesting that the results are pretty similar for the two intervals. The new numbers are a little better on a ppm/1000mi basis but not the bigger drop in wear metals from break-in that I was expecting.

The Redline appears to have more ZDDP than the factory oil.

I wonder how does the fact that old oil remains in the coolers affect the analysis? How long before a rotary engine is fully broken in? The fuel content/dilution is rather high but I guess that is the nature of the rotary..

Glad to see you joined the oil board Compact, I haven't seen any rotary analysis posted there in a long time, you are the first in a while.

Did you ever consider using a 0w/5w30? A 30 weight oil is recommended outside of North America isn't it?