I am going to try to make it as short as possible. Issue is that my oil looks like a metallic paint even after 5 oil changes.My R34 GTR ended up with a bad bearing earlier this year, so i decided to buy a brand new engine, Fresh 2nd hand Rb26 block, brand new head, Brand new cams springs etc, Brand new Nissan OEM RB26 crank, brand new nitto oil pump, New pistons and rods etc, Not a single part from my old engine was reused. I replaced all hoses and coolers etc etc.
The engine is assembled by a reputable shop in my country that i trust fully, They do forged engines on a daily basis so all clearances etc and machine work is done by someone who is doing it all time.
I did start up the Engine with my tuner, we took it for a spin to drive it warm and he was checking all values while i was driving (had to retune it a bit since i got other cams and Injectors)Engine did run about 1 hour then i replaced oil and filter to Motul Chrono 10-w40 (oil pressure is on idle 900rpm is at around 4bar) Warm oil 85 degrees. RUNNING E85
For some reason i did collect the oil and noticed that it looked All like a metallic paint. you cant feel the "flakes" but if u have a really strong Led light you can clearly see "shimmer" in the oil, At first i was like oh this is a normal thing running a garage 101 oil pan so its around 9liters of oil in the car + oil cooler.
After this oil change we did some roadtuning (this time we drove the car 2 hours approx) and gave the Engine some boost (base pressure from gates) and it all was working perfect. Once we have tried everything out we decided to take it on the dyno next session. Since i couldent really relax from the metallic look of the oil so i went with another Oil change and it did still look like metallic. Maybie not AS much as first but still if u were having a strong LED light you could still see the flakes but not feel them. Since the car was already on the lfit then i Started it and ran it until oil temps was 85 degrees again and did 2 more Oil changes and i could see that the "shimmering" was reduced a bit. Also i have a Magnetic oil plug and there is barely ANY debrises on it
We did then Hit the dyno and made 707 AWHP on a safe tune (E85) GTx3584 gen2, And the car runs like a dream but i still get the "shimmer" in the oil. the Car has now been running around 400kms Since it was built and i did my 5th oil change and could still see all the metallic "flakes" Oil pressure is unchanged on idle and while driving, Engine sounds really good and healthy.
Have you inspected the oil of ur new engines with a really strong led? if so how did it look?
Some people have told me that it should be ZERO shimmer, Some people say its the normal wear you can see, Some say its normal run in stuff but it doesent feel magnetic at all. Some say that the ARP lube + LOCTITE assembly lubes can make the oil look like metallic paint. I would accept all of those things at first 1-2 changes but now i have done 5 oil changes in a really short period and run time tho but it makes me worried, should i pull out the engine again and check the bearings before i ruin my new Crank?
Here is some pics of the oil