NSX Suzuka preparation and a ray of light on oil temperature measures!

On the first weekend of February, I went for an oil change to prepare for Suzuka in March, even though it was a little early.
I also had an idea about the pending oil temperature countermeasure, so I decided to try it with the oil change.
Well, it's an amateur idea, so I doubt if it will work or not, but it's easy to do, so I thought I'd give it a try before replacing the cooler core.
If this doesn't work, I will finally replace the cooler core.
■Photographing equipment
　Dji osmo action 4
　Sony RX100M7
　Dji MIC2
#nsx
#nsxr
#osmoaction
#RX100M7
#dji mic2
#Oil change
#air conditioner compressor cover

[@waynemillis4418]

Interesting problem with the sludge in the oil pan. You have the best oil cooler available. Sludge is caused by oil over heating and as your engine is in good condition so not ring blow by. Please check to see if air is is going through the oil cooler by placing a strong fan in front of the car and put a piece of paper and also try with your hand at the back of the cooler and check for air movement on both sides of the core. You need space for the air to go after going through the core. We had this problem with our race car radiator and blew 2 engines before noticing very little air flow due to being too close to the engine.

[@83nnsax137]

I had no idea how much sludge had accumulated until I removed the oil pan.
There is about 400cc of oil that has not been drained out by the drain, so from now on I will suck out the remaining oil along with the sludge.
I have checked the air flow, but to the extent that I applied air blow, it was dampened by the oil cooler & radiator and did not pass through as much as I thought.
I will get a more powerful fan to check.

[@waynemillis4418]

@@83nnsax137 That's a lot of sludge, too much. Usually multi grade modern oils break up the sludge that is already in the engine and old engines. Your engine is new with regular oil changes. Check ring blow-by by removing the dip stick and rev the engine and feeling for excessive air flow. Remove the engine oil cap and check for foam or sludge. The Setrab core is more than enough to cool your oil and maybe too much in winter. Move the core around to get the best flow and test the oil temp. under many speeds. High oil temp will slowly cause sludge but full synthetic oil will release sludge from around the engine. Check radiator to see if you are not losing (bubbles) anti freeze, blown head gasket which will cause sludge. Over filling oil capacity. Hope these cheap checks will help.

[@83nnsax137]

Thanks for the information.
We do not run the oil cooler except for circuit driving, and the oil temperature is usually around 80-90°C.
We run the oil cooler only during circuit driving, but the oil temperature still exceeds 120℃ and rises to a maximum of 137℃ as shown in the video.
Therefore, we are implementing various oil temperature countermeasures.
We are concerned about the oil pump not being able to suck oil due to lateral G at the circuit, so we are using a larger amount of oil (upper level).
That may be one of the causes of sludge.

[@mochadriver1126]

お花見は楽しんできて下さい😊
今回は欠席です😢
エンジンOH中で慣らしが終わったらまた参加します。例の6月は参加します😊

[@83nnsax137]

間に合いませんでしたか。。。
今回は残念ですが、次回ご一緒できるのを楽しみにしています。