Results of "wrong" oil?

[x-box]

After having followed quite a few threads on engine oils, may i ask what the consequences will be for putting 15w40 oil in a TD5 instead of 5w40?
It fascinates me how different engines operate on different oils.....
I wish i had all the answers but i don't, so thanks for the input

[justinc]

Hi Loius,

RICK130 certainly knows his stuff regarding lubricants for engines, I would agree that looking at that comparison he showed that you may not hurt the engine much if at all.
BUT,(there is ALWAYS a BUT)...The only thing I would advise is that the CONSEQUENCES of any damage caused to a Td5 by lubrication failure/ inadequacy are very costly, for example a new cam is around $1200, and the followers/ rollers are also quite considerably expensive each. There are 10 of them There are also 5 injector rockers, which are roller type and also very $$$$$. The list goes on.

I would just source a good quality resonably priced synthetic 5w?? oil and change at the required interval that best suits your driving.

My 2c worth.

JC

[vnx205]

After having followed quite a few threads on engine oils, may i ask what the consequences will be for putting 15w40 oil in a TD5 instead of 5w40?
If I understand the information in the back of my 300Tdi owners manual correctly, that is actually the same question as, "What will be the consequences of driving where the temperature is 45 instead of 35?"
According to the manual, if I was expecting temperature between -10 and 35, then I should be using 10W30. If the temperature range is expected to be -10 to 45, I should use 10W40.
I would hope that the difference in the effectiveness of each grade would be small and that possibly there would be greater differences between different brands of supposedly the same grade.
I think some of the very comprehensive information in earlier threads about oils and viscosity suggested that.
Of course (as I just noticed) you are asking about 5W versus 15W, which I suspect is a huge difference compared with 30 versus 40.

[Blknight.aus]

in aus, in queensland very little..

long term you can expect accelerated wear on the top of the donk and shorter change intervls as the centrifuge filter will be less efficient.

after thaty its just a case of how goiood the oil is and how often you change it.

[rick130]

in case you missed the relevant post in the General forum


SAE viscosity ranges are really deceptive.
Here's a post I added to a thread on another forum once. Note that at 0*C, Redline 15W-40 is thinner than Penrite HPR5 5W-40 ! Once temps get below this, HPR5 will win out. Quote:

5w-40 is NOT thinner than an equivalent 15W-40 at operating temp, in fact there may be f%ck all difference at 0*C, and some 5W-40's are thicker than some 15W-40's at 0*C.
An SAE viscosity is a range, actual viscosity is measured in centistokes (cSt) eg an xW-40 must fall between 12.5 cSt and 16.3 cSt @ 100*C (most apear to fall @ 14-15cSt)
A 0W-xx or 5W-xx is able to pump/flow at much lower temps than a 15W-xx. Pumping viscosity at low temps is measured in centiPascals (cP) and a 0W-xx cannot exceed 3250 cP @ -30*C , a 5W-xx must not exceed 3500 cP at -25*C, and a 15W-xx cannot exceed 3500 cP @ -15*C.

Here's some specs for a few different oils at various temps

Mobil Delvac 1 5W-40. 14.8 cSt @ 100*C. pour point -45*C
Castrol RX Super 15W-40. 14.5 cSt @ 100*C pour point -27*C
Redline 15W-40. 15.1 cSt @ 100*C. pour point -45*C
Penrite HPR5 5W-40. 15.1 cSt @ 100*C. (no pour point given)
Shell Rimula Ultra 10W-40. 14.6 cSt @ 100*C. pour point -30*C
Castrol Magnatec 10W-40. 14.6 cSt @ 100*C. pour point <-35*C

yet at 0*C we get

D 1= 1066 cSt
RX = 1358 cSt
RL = 1122 cSt
HPR= 1350 cSt
RU = 0809 cSt
Mag = 1182 cSt

a 10W-40 (Shell Rimula Ultra) is actually thinner than both 5W's, and a 15W (Redline) is thinner than the 10W Magnatec and the Penrite HPRD5 at 0* !

It's only when you get down to North American type winter temps that the 5W-40's really show an advantage in pumpability.

HPR5 has a cranking pressure (cp) @ -30*C of 5719, yet
Magnetec has a cp of 7000 @ a warmer -25*C.
The only other directly comparable number was for the older CH-4 version of Delvac 1 which had a cp of 3250 @ -25*, and 20,000 @ -35*.The reason that synthetic fluids are called out is due to the recommended 20,000km OCI.

You can draw your own conclusions.

[dobbo]

Remember your turbo is oil cooled, the engine should be fine, the turbo may have worn

[rick130]

Remember your turbo is oil cooled, the engine should be fine, the turbo may have worn

huh :confused: how do you work that out ?
Turbo charged diesels have used 15W-40 for almost forever.

[George130]

So what you are saying rick is that in Australia you don't really need the HPR5 but could use a 15.
For this argument in winter it gets to -8 round my way.