The following is a wear plot for an Audi RS4 engine over a period of 18K miles, with samples taken at 3K oil intervals. This engine has proven to be a bear on oils, because of chemical shear, due to high fuel dilution of the Direct Injection, combined with the mechanical shear of an 8250 rpm racing V8. Oil in this engine has been shown to have about a 3000 mile or less life expectancy.
So, about a year ago I enlisted the consulting services of the esteemed Terry Dyson, to figure this puppy out, and formulate a best oil solution for this beast. Prior to the experimental test oil, Elf Excellium LDX 5W-40 and Motul Etech 0W-40 were used in this engine, with poor results. Other RS4 owners (10 in total) have participated in subsequent monitoring and testing of different Audi-approved 502.00 oils. After studying the problem and performing some focused testing over the past year, Terry has worked with a formulator on my behalf to design an oil to solve these problems.
The initial 3000 mile testing on the Double-Super-Secret Experimental Racing Oil is complete. The stuff that Terry Dyson designed for the RS4 engine and had formulated works. All wear numbers are down to lowest levels ever recorded in an RS4.
Sample points are shown. The curves are Excel fits to the points.
Flashpoint is up to 320F, from a recorded low of 235F in my engine.
Fuel dilution is down to 1.29%, from a high of 2.37%.
Viscosities are highest recorded for 5W-40 Oil in an RS4
100C cSt - 13.3 (low 40W)
40C cSt - 76.6 (high 20W)
These measurements include two track days at Watkins Glen at sustained high rpms.
I'm sure that Terry will entertain answering questions in due time.
So, about a year ago I enlisted the consulting services of the esteemed Terry Dyson, to figure this puppy out, and formulate a best oil solution for this beast. Prior to the experimental test oil, Elf Excellium LDX 5W-40 and Motul Etech 0W-40 were used in this engine, with poor results. Other RS4 owners (10 in total) have participated in subsequent monitoring and testing of different Audi-approved 502.00 oils. After studying the problem and performing some focused testing over the past year, Terry has worked with a formulator on my behalf to design an oil to solve these problems.
The initial 3000 mile testing on the Double-Super-Secret Experimental Racing Oil is complete. The stuff that Terry Dyson designed for the RS4 engine and had formulated works. All wear numbers are down to lowest levels ever recorded in an RS4.
Sample points are shown. The curves are Excel fits to the points.
Flashpoint is up to 320F, from a recorded low of 235F in my engine.
Fuel dilution is down to 1.29%, from a high of 2.37%.
Viscosities are highest recorded for 5W-40 Oil in an RS4
100C cSt - 13.3 (low 40W)
40C cSt - 76.6 (high 20W)
These measurements include two track days at Watkins Glen at sustained high rpms.
I'm sure that Terry will entertain answering questions in due time.