So after I built my engine my car was VERY quiet, people commented on how quiet my engine was and all was right with the world. After the break in period around 3,000 miles I switched to synthetic oil and my engine sounded like a direct injected diesel, loud and obnoxious, everything was ruined. I've been pretty bummed about this for awhile so I tried switching oil, first I tried mobile 1 10w-40, then redline 10w-40, no noticeable reduction in noise (though redline actually ran a few degrees cooler in summer heat).
10k miles later and the car is running great but the engine is still loud, and I ran across
this article on RS-R's Ran-Up oil treatment.
Quote:
It is a 0-20w synthetic oil full of ceramic nano particles that act like billions of miniature ball bearings in your engine.
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Among the claims that it produces more power (which isn't hard to believe if you understand how oil works), I read many reviews at how the engine became quieter after using it. Since RS-R is a reputable company (i still remember how bad *** my SR20 sounded with an RS-R Exmag exhaust) I decided for $50 it was certainly worth a shot.
I decided to take a before and after video, and boy am I glad I did. This stuff works amazingly well,
listen for yourself.
This was taken the same day, the oil was recently changed (10w-40), the engine was fully warmed up in the before/after videos. All I did was drive the recommended 30 miles after adding the oil treatment, thats it. I haven't driven it much beyond the initial mileage so I will update this thread with further impressions but as of right now I plan on adding this with every oil change (only about 2-3 a year as this is not my daily driver).
Note: I have no affiliation with RS-R and they didn't pay me to post this, I was just so fcuking excited about the drastic reduction in noise and i wanted to share my results with the community.