These are the Filtergram images you wanted to have a look at. Could you give us some mileage/useage reports and oil types as we have been flying blind with these samples. I will give you my thoughts....
Transmission oil - looks to be doing it a little on the tough side. The types of metals seen here are consistent with a hard driven stock fill thats seen plenty of duty cycle
Engine oil - Typical GTR engine fill. A fair bit of dirt and 5 - 10 micron bearing material scattered through the sample.
Enshiu after futher contact I believe the engine oil to be Motul, and the transmission fluid to be something that Dodson markets. Again this is only information gained from a couple of samples that lobbed on our doorstep around two months back. Possibly the owner of the fluids could chime in with some more information!
Thanks for your email correspondence and your posts on NAGTROC. The NAGTROC posts are what inspired me to have my GT-R fluids tested.
Enclosed are samples of Transmission Fluid (Dodson >86F version) and Engine Oil (Red Line 0W-40).
The purpose of having the samples objectively tested is so I can determine just how hard my track sessions & the coach's race session are on my fluids so I know how often I need to change them out. I am also curious about how the Dodson Trans Fluid held up to the abuse. Since these samples were taken, I have changed the Trans Fluid to the WillAll Lite and have changed the engine oil & filter (RedLine 0W-40 & K&N filter) and the Differential Fluids changed (RedLine 75W-140). I do believe the WillAll Lite Trans Fluid is a better match to my cooler driving conditions here at Lake Tahoe, Nevada, but my track sessions are typically at 85-95F ambient temps. I may get an objective Trans Fluid test of my WillAll Lite at some point.
I've had 3 track days this summer with some focused/all day coaching. Ambient hi temp 85deg (pretty low temps compared to average track temps this time of year) & low relative humidity:
Max Engine Oil Temp: 222
Max Trans Fluid Temp: 257
Max Coolant Temp: 203
However, I let my coach drive me around for a session (COBB level 3) & he blew away all the other coaches (the ZR1 did not come out):
Max Engine Oil Temp: 233 Max Trans Fluid Temp: 289 -yikes! Looks like I'll be needing a full size trans cooler for the next round of mods this off season!
Max Coolant Temp: 210
I don't think I'll let the coach drive my car again anytime soon.
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