RI A6

Thank you to everyone who has been participating in our RS4 oil study. Without each and everyone of you, we wouldn't be where we are today.

I thought I'd post some of the ongoing results of that close consult and testing that Terry Dyson has provided for us in the RS4 community. These are oil analysis results for 11 different Audi RS4 engines with mileage from almost new to 20K, and show the significant reduction in iron wear due to the custom Renewable Lubes formulation some of us have been using. This oil is performing incredibly well in one of the toughest engine environments around.

I believe 5 RS4 owners have now switched over. I personally have 11K miles on the oil. Others are following quickly. Our data now shows the effectiveness of this oil in Audi RS4 engines, even starting at break-in. For those who are willing to go the non-Audi-approved route, there are significant engine wear advantages for using this oil in any Audi/VW engine, especially those with FSI direct injection and Alusil blocks.


Mileage Mileage on Oil .. ........ Oil .................... Iron(ppm) ... Vehicle #

03533 ...... 1500 ......... RLI Biosyn 5W-40 ............ 15 ....... Vehicle 7
04986 ...... 3000 ......... RLI Biosyn 5W-40 ............ 16 ....... Vehicle 7
05280 ...... 3580 ......... Motul 300V 5W-40............ 36 ....... Vehicle 8
05325 ...... 4580 ......... Motul 8100 E-tech 0w-40 ...48 ....... Vehicle 11
07242 ...... 4175 ......... Motul Xcess 5W-40 .......... 28 ....... Vehicle 9
08580 ...... 3580 ......... Castrol Syntec 5W-40 ...... 31 ....... Vehicle 9
09719 ...... 2477 ......... Motul Xcess 5W-40 .......... 18 ....... Vehicle 10
10820 ...... 3050 ......... Motul 8100 E-tech 0w-40 ... 23 ....... Vehicle 2
11896 ...... 2923 ......... Motul 8100 E-tech 0w-40 ... 18 ....... Vehicle 1
12100 ...... 7000 .......... Castrol Syntec 5W-40 ...... 46 ....... Vehicle 3
12803 ...... 2803 .......... Castrol Syntec 5W-40 ...... 19 ....... Vehicle 4
16554 ...... 1488 ............ RLI Biosyn 5W-40 ........... 7 ....... Vehicle 1
16780 ...... 1906 ............ RLI Biosyn 5W-40 ........... 7 ....... Vehicle 5
17000 ...... 4500 ............ Mobil 1 0W-40 ............. 37 ....... Vehicle 6
18061 ...... 2995 ............ RLI Biosyn 5W-40 ........... 9 ....... Vehicle 1
20226 ...... 5160 ........... RLI Biosyn 5W-40 .......... 10 ....... Vehicle 1

sparkhill

How do you purchase the oil?

RI A6

Contact me by email and I'll send you the information.

daveak05

Scott, at the bottom of your list, why does vehicle 1 show 5160 miles on oil from 18,061 to 20,226? was the oil not changed, but analyzed again?

and if that's the case, interesting that it shows 10 iron ppm with 5160 miles and vehicle 7 shows 16 with 3000.

vehicle 1 is obviously your baby too, que?

quickaudi:STFA

any ELF testers?

RI A6

Nothing special. Better then Castrol and Mobil 1, about the same as Motul.

RI A6

Yes, vehicle 1 is my car, and yes an intermediate sample was taken. Same for Vehicle 7.

Vehicle 7 has higher wear, since the engine was still in the midst of early break-in. As you can see his oil change occured at about 2K miles. For the record, his factory oil had 25 ppm of Iron over the 1st 2K miles, which is in the high end of the range we've seen on most every RS4.

The key thing to notice is the incremental wear between the samples. Both vehicle 1 and vehicle 7 see only 1 ppm of incremental where after the oil "settles in". This is unusual for this engine. All other oils tested have much higher long term wear rates.

daveak05

well, now you have 11 identical vehicles on one oil. grow that to 50 and you have a valid sample group. even so, i think you can begin to draw some conclusions, as i am sure you're busy doing. good luck going forward.

RI A6

We're at 13 vehicles so far. Out of 1500 cars total that gives us a statistical confidence interval of about +/- 35% with 99% certainty. Any measurement differences that are greater than this interval can be considered quite real. Our incremental iron wear results are well outside of this confidence interval for BioSyn oil measurements, with most differences of > 300%.

In fact, we have more sample engines than are customarily measured in SAE peer reviewed papers. Because of the uniformity of results with engines, most SAE oil papers tend to run only 1 or 2 engines with the same oil sample.

daveak05

you want a confidence level of about +/- 5% with 99% certainty. stop with the flying formulas already! 13 out of 1500 is quite insufficient.

i don't understand how you can just apply a formula at any given time w/o meeting necessary criteria. heck, i was happy for your 11, and willing to recognize the value of your limited, but growing results. then you come back with this +/- 35% stuff. Scott, Scott...