RB25DET Engine Oil Dipstick Length

[DraftySquash]

Hey everyone!! 

I've noticed that whenever I do my oil changes, after putting 4L in, the oil level sits at the top mark in the dipstick. This is after letting the old oil drain for a very long time too! I've checked the oil level daily for the past few mornings.
It happens every time and it's confusing because all the threads say that it should take about 4.7L (With some just adding the full 5L)

My next thought is to figure out if the dipstick I have is correct so could someone please tell me the length of the RB25DET engine oil dipstick? 

I've checked images of some of the genuine dipsticks, but none of them have the length in it.

https://justjap.com/products/genuine-nissan-engine-oil-level-dipstick-fits-nissan-r34-skyline-c34-stagea-c35-laurel-y34-cedric-gloria-rb25de-t-neo?currency=AUD&srsltid=AfmBOortQXofgmiHVRKuIaiKuygL4k0Ewp68c3isGZk0vvKOJ7Yqf3iB

However.... the engraving on the genuine ones say 05002 while mine says AA000. This makes me believe that maybe I have a wrong dipstick? I just want to confirm before I buy a new one. The car is a fresh import from Japan so I don't have details of the previous owner to ask him.

Thanks in advance 🙏🏾 

Edited Saturday at 04:00 AM by DraftySquash

[joshuaho96]

3 hours ago, DraftySquash said:

Hey everyone!! 

I've noticed that whenever I do my oil changes, after putting 4L in, the oil level sits at the top mark in the dipstick. This is after letting the old oil drain for a very long time too! I've checked the oil level daily for the past few mornings.
It happens every time and it's confusing because all the threads say that it should take about 4.7L (With some just adding the full 5L)

My next thought is to figure out if the dipstick I have is correct so could someone please tell me the length of the RB25DET engine oil dipstick? 

I've checked images of some of the genuine dipsticks, but none of them have the length in it.

https://justjap.com/products/genuine-nissan-engine-oil-level-dipstick-fits-nissan-r34-skyline-c34-stagea-c35-laurel-y34-cedric-gloria-rb25de-t-neo?currency=AUD&srsltid=AfmBOortQXofgmiHVRKuIaiKuygL4k0Ewp68c3isGZk0vvKOJ7Yqf3iB

However.... the engraving on the genuine ones say 05002 while mine says AA000. This makes me believe that maybe I have a wrong dipstick? I just want to confirm before I buy a new one. The car is a fresh import from Japan so I don't have details of the previous owner to ask him.

Thanks in advance 🙏🏾 

AA000 is for R34 GTT. 11140-05002 is not a part number that exists in Nissan's parts catalog. R33 GTST is 11140-21U00. 11140-05U02 is for the RB26.

[GTSBoy]

405mm from the underside of the flange to the tip. I will have photos soon.

Mine is in a Neo, is AA000.

[GTSBoy]

[DraftySquash]

On 4/1/2025 at 6:46 PM, GTSBoy said:

405mm from the underside of the flange to the tip. I will have photos soon.

Mine is in a Neo, is AA000.

Thanks a lot for this @GTSBoy

Mine is a NEO too so this is a good reference. It’s just weird because I’m putting in 4L and it already reaches the H mark 

[DraftySquash]

Hmmm interesting. Mine is the exact same and clearly the right one. 
The mystery of the engine oil being full after 3.5-4L continues 

[GTSBoy]

3 or 4 8-balls in the sump?

[DraftySquash]

Must be for the car’s lucky charm 🤷🏽‍♂️

She runs fine, but it just seems to take about 1L less. Maybe I’ll have the oil sump dropped at some point to check if there is anything 

Edited Saturday at 02:20 PM by DraftySquash
Typo

[joshuaho96]

21 hours ago, GTSBoy said:

3 or 4 8-balls in the sump?

I could see someone trying this to save money on oil changes.

[joshuaho96]

18 hours ago, DraftySquash said:

Must be for the car’s lucky charm 🤷🏽‍♂️

She runs fine, but it just seems to take about 1L less. Maybe I’ll have the oil sump dropped at some point to check if there is anything 

You can try shoving a borescope down there to see what's up.