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0w40 vs. 5w30


Romulus

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La e39 nu exista senzor de uzura la ulei? apropo, cat mai costa litrul de 5W40 long life la Filaret sau la AB?

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BMW LL04 5W30 cumparat saptamana trecuta de la AB baneasa ~75 ron/litru :) => ~600 ron un schimb de ulei (7l defapt trebuiesc 6,5)+ filtru :blink:

Edited by io's
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  • 4 years later...
Buna ziua nu pot sa va spun oficial la cat se schimba uleiul 5w30 dar in manualul de reparatii BMW scrie ca nu se mai recomanda uleiul 5w40LL-98 ci doar 5w30 deoarece densitatea la rece si la cald nu mai variaza asa de mult in cazul folosirii uleiului 5w40 acesta sa seschimbe la cel mult 15000km Edited by Cipri.T
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1. Vezi ca topicul e din 2007, cred ca s-a lamurit pana acum

 

2. Sigur ai vrut sa spui "densitate"?

 

DENSITĂTE, densitĂŁți, s. f. 1. MĂŁrime fizicĂŁ definitĂŁ prin raportul dintre masa și volumul unui corp; masĂŁ specificĂŁ. – Din fr. densitĂŠ, lat. densitas, -atis.

Sursa: DEX '98 | AdĂŁugatĂŁ de cornel | SemnaleazĂŁ o greșealĂŁ | Permalink

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La modelele mai noi exista un senzor care analizeaza calitatea uleiului

Fals. Estimarea pt schimbul de ulei se face in functie de stilul de condus, in niciun caz nu se analizeaza calitatea uleiului.

Edited by LYM
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Depinde de km facuti intr-un interval de Timp

Uleiul se schimba indiferent de motorizare odata pe an exceptie M sau exploatarea in regim de oras relantii sau condus sportiv

La condusul in regim de autostrada clar ca se prelungeste nr de km cu ar fii 30000

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Cam asta este ideea,iti iei BMW si nu bagi nici un ban in el.Din pacate acum se vad rezultatele,cand motoarele au ajuns la un numar mai mare de km.

O problema mare la M54 la momentul actual este data de pornirile la rece,urmate de misfire,cel putin asa am auzit.

Acum apar urmarile schimbului de ulei dupa 20.000km,mers cu masina numai prin oras,porniri si opriri dupa scurt timp,...etc.

Uleiurile lifetime sunt "foarte bune",masina iese din garantie pana sa se strice cutia :)

 

Asta este tendinta tuturor constructorilor de masini,sa vanda masini care nu necesita intretinere.

Unii au si marit garantia pentru a demonstra increderea in produs,GM-ul are 160.000km acum,pentru cutie si motor.Ma rog,avand in vedere ca este aproape de faliment,cine stie...

Ford a scos un nou model diesel,recent,dupa cateva luni a avut aprox 250 recall-uri,ceea ce i-a determinat sa scoata modelul de la vanzare.Acum se judeca cu cei de la International,care au livrat motorul.Asta ca o paranteza apropo de BMW si fiabilitate :blink:

Problema la motoarele M54 este adevarata. Detin un E39 cu acest tip de motor si a avut problema mentionata mai sus. Acum am rezolvat-o prin segmentare, supape evacuare si tacheti noi. Intrebare: CARE ESTE ULEIUL POTRIVIT PENTRU MOTOARELE M54(5W30 LL01 sau 5W30 LL04 sau 5W40 LL98??) si CARE ESTE INTERVALUL DE KILOMETRI OPTIM, PENTRU SCHIMBUL DE ULEI??

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Depinde de km facuti intr-un interval de Timp

Uleiul se schimba indiferent de motorizare odata pe an exceptie M sau exploatarea in regim de oras relantii sau condus sportiv

La condusul in regim de autostrada clar ca se prelungeste nr de km cu ar fii 30000

Intru si eu in subiect,la modelul E39 motor 2,5d,120kw,care credeti ca ar fii uleiul necesar? 5w30 sau 5w40 sau 0w40?Intreb ca unul care a intrat pentru prima data in posesia unui BMW.Multumesc.

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Fals. Estimarea pt schimbul de ulei se face in functie de stilul de condus, in niciun caz nu se analizeaza calitatea uleiului.

Fals.

Chiar exista un senzor care masoara 3 lucruri, in ceea ce priveste uleiul. Datele obtinute prin masurare sunt transmise sistemului de management al motorului, care decide cate leduri sa vezi tu aprinse in bord. Asta asa, foarte pe scurt...

Edited by Rares_CJ
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info on the N54 oil sensors.

 

Oil condition sensor

The oil condition sensor increases the function range of the thermal oil level sensor. The oil condition sensor measures the following variables:

! Engine oil temperature

! Oil level

! Engine oil quality

The engine management system evaluates these measurements. With the oil condition sensor, the electrical properties of the engine oil are also determined. These properties alter when the engine oil shows signs of

degradation and aging.

 

Measuring method

The oil condition sensor consists of 2 cylindrical condensers. The ondensers are mounted above one another. 2 metal tubes are inserted one into the other to serve as electrodes. The engine oil is used as a dielectric medium between the electrodes.

Note! Explanation of the terms 'dielectric' and 'permittivity'.

A dielectric is defined as a non-conductive material in an electrical field. The electrical field is split by an insulator.

The permittivity (Latin: permittere = permit, let through) is also referred to as the dielectric conductance. The permittivity specifies the degree to which materials allow electrical fields to pass. The factor indicates by how

much the voltage at a capacitor drops when a dielectric, non-conducting material is arranged between the capacitor plates.

 

The temperature sensor is seated on the housing of the oil condition sensor. The housing of the oil condition sensor contains an electronic evaluation unit. The electronic evaluation unit has self-diagnosis. A fault in the oil condition sensor is entered in the fault memory of the engine management system.

 

The oil condition sensor sends its measured values to the engine management system:

! Engine oil temperature

! Oil level

! Engine oil quality

The electrical material properties of the engine oil change as the engine oil wears and ages. The changed electrical properties of the engine oil (dielectrics) cause the capacity of the capacitor to change.

The electronic evaluation unit converts the measured capacity into a digital signal. The digital sensor signal is sent to the engine management system. The engine management system uses the signal for internal calculations

(e.g. condensate in the engine oil).

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Interesant. Inseamna ca sunt aia tampiti la bmw, ca am intrebat la doi dealeri diferiti si am primit acelasi raspuns.

Totusi, pe realoem nu-mi apare decat OIL LEVEL SENSOR; o fi unul si acelasi lucru ... habar n-am. E bine de stiut, oricum. Merci :thumbsup:

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Eu am folosit numai ulei BMW 5W-30 LL04 (la diesel). Mi se pare un ulei foarte bun pentru Romania. Prin alte tari din Europa se foloseste mai mult 0W-30 (din ce am vazut in mai multe carti service ale unor masini diesel aduse din afara).

 

Dar astea cu 0W-30 faceau schimbul de ulei la 25-30k km.

 

0W-40 n-am vazut la niciuna. Dar totusi cred ca este un ulei mai potrivit pt Romania decat 0W-30.

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E foarte bine. Astea cu 0W ajuta la pornire iarna la temp. f. scazute , fiind un ulei subtire. Dar daca te uiti pe "plaja" de temperaturi vei vedea ca 0W-30 nu este asa potrivit pentru clima Romaniei mai ales vara. 0W-40 si 5W-30 sunt cam asemanatoare din punct de vedere al caract. tehnice.
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  • 1 year later...

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