Using a 0W40 where 5W40 is recommended ?

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We've got a 2009 Rabbit with the the 2.5L engine (non turbo)...Would there be any issues warranty or otherwise in reguards to wear protection for the duration of a 10,000 OCI using a 0W40 since the manual recommends a 5W40 ? We were thinking of using M1 0W40....
 
If my memory serves, I think you'll find that Mobil 1 0w-40 meets the specs for your car. You should be able to use it with confidence.
 
Spec is vastly more important than viscosity. If he's using an oil that meets the right VW 50x.xx spec, then he IS going with VW's recommendation; 5w-40 is just an added guideline but it is by no means binding (unless the manual says so, which I don't think it does).

5w vs. 0w isn't a big deal in this case, especially since either one would have a lot of VIIs to have an SAE 40 hot viscosity rating and the engine should be very easy on oil anyway.

Mobil 1 0w-40 is one of the best oils on the shelf and perhaps one of the best oils ever made. It should be as good as or better than almost any easily obtainable 5w-40 in this application.
 
Originally Posted By: d00df00d
Spec is vastly more important than viscosity. If he's using an oil that meets the right VW 50x.xx spec, then he IS going with VW's recommendation; 5w-40 is just an added guideline but it is by no means binding (unless the manual says so, which I don't think it does).

5w vs. 0w isn't a big deal in this case, especially since either one would have a lot of VIIs to have an SAE 40 hot viscosity rating and the engine should be very easy on oil anyway.

Mobil 1 0w-40 is one of the best oils on the shelf and perhaps one of the best oils ever made. It should be as good as or better than almost any easily obtainable 5w-40 in this application.


I thought certain base stocks had naturally high VI, lessening the need for heavy doses of VII?
 
Originally Posted By: BobFout
I thought certain base stocks had naturally high VI, lessening the need for heavy doses of VII?

Exactly: lessening the need for VIIs, but not eliminating. That was my point. Sorry; I should have been clearer about that.

I didn't mean to say either viscosity grade would be "more plastic than oil", as ARCOgraphite would say. I just meant that either viscosity grade will have significant VII content when you're looking at off-the-shelf oils.

As I understand, it might be possible to formulate a 0w-40 or 5w-40 with no VII content but it would be HIDEOUSLY expensive for little or no real benefit. Even Red Line, RLI, Amsoil, and Motul use VIIs to make oils that meet those viscosity grades.
 
I do not believe that our 08 rabbit mentions any viscosity - just the spec. Ive run 5w-40, 5w30 and would run 0w-40 as well. Just has to meet the spec, which forces the oil to be ACEA A3, perhaps forces it to be syn, etc.
 
Originally Posted By: d00df00d
I just meant that either viscosity grade will have significant VII content when you're looking at off-the-shelf oils.


Which is why we are running M1 ESP 5w30, which carries VW 504/507, which supercede the 502 specs. UOA results coming!
 
Originally Posted By: Oregoonian
Why wouldn't you want to use VW's recomendation?

For your climate 5w40 seems perfect....


Well, we would like to try something different...We have been using the valvoline 5W40 since new but the 0W40 is the only other VW 502 oil we can find and it's also more readily available than what we are currently using...
 
Originally Posted By: whitesands
Originally Posted By: Oregoonian
Why wouldn't you want to use VW's recomendation?

For your climate 5w40 seems perfect....


Well, we would like to try something different...We have been using the valvoline 5W40 since new but the 0W40 is the only other VW 502 oil we can find and it's also more readily available than what we are currently using...


No Castrol Syntec 5w40?
 
The store I get the Valvoline at may carry the Castrol but I don't know...That store closes early so it's hard for me to make it there in time....Just looking for some other options because the M1 0W40 seems to be everywhere...
 
Originally Posted By: BobFout
Originally Posted By: whitesands
Originally Posted By: Oregoonian
Why wouldn't you want to use VW's recomendation?

For your climate 5w40 seems perfect....


Well, we would like to try something different...We have been using the valvoline 5W40 since new but the 0W40 is the only other VW 502 oil we can find and it's also more readily available than what we are currently using...


No Castrol Syntec 5w40?

Question: "Trying something different"....do you really think its going to make a significant difference?

Using a 0w oil in Texas!...I could understand it if you lived in a climate with winter temps in the sub-zero area...but Texas???
 
Originally Posted By: BobFout
Originally Posted By: d00df00d
I thought those were low-ash specs. Are you sure they supersede 502 for all cars?


Mobil makes the claim, and I've seen documents from other oil manufactures stating the same.

http://www.mobil.com/USA-English/Lubes/PDS/glxxenpvlmomobil_1_esp_formula_5w30.pdf


Right, that is what Ive seen too. Since we have a PZEV vehicle without flat tappet cams, i figure the oil would be suitable for the application. UOA will determine. It is in the mail, and hopefully I can post it this weekend.
 
Originally Posted By: Oregoonian
Originally Posted By: BobFout
Originally Posted By: whitesands
Originally Posted By: Oregoonian
Why wouldn't you want to use VW's recomendation?

For your climate 5w40 seems perfect....


Well, we would like to try something different...We have been using the valvoline 5W40 since new but the 0W40 is the only other VW 502 oil we can find and it's also more readily available than what we are currently using...


No Castrol Syntec 5w40?

Question: "Trying something different"....do you really think its going to make a significant difference?

Using a 0w oil in Texas!...I could understand it if you lived in a climate with winter temps in the sub-zero area...but Texas???

What's wrong with a 0w oil? M1 0w40 and GC 0w30 are both great oil's for hot climates as well. GC is a very thick viscosity 30 weight and the M1 is probably their flagship oil. Both are outstanding oils.
 
Originally Posted By: shpankey
Originally Posted By: Oregoonian
Originally Posted By: BobFout
Originally Posted By: whitesands
Oregoonian said:
Why wouldn't you want to use VW's recomendation?



Well, we would like to try something different...We have been using the valvoline 5W40 since new but the 0W40 is the only other VW 502 oil we can find and it's also more readily available than what we are currently using...


The question is...will it make a signifigant difference?
IMO...it will be just a 'plecebo' effect...If 5w40 has worked well in the past..keep doing it.

In performance, engine wear etc. IMO..its just a plecebo
effect....If 5w40 worked well...stick with it.

No Castrol Syntec 5w40?

Question: "Trying something different"....do you really think its going to make a significant difference?

Using a 0w oil in Texas!...I could understand it if you lived in a climate with winter temps in the sub-zero area...but Texas???

What's wrong with a 0w oil? M1 0w40 and GC 0w30 are both great oil's for hot climates as well. GC is a very thick viscosity 30 weight and the M1 is probably their flagship oil. Both are outstanding oils.

The question is....will it make a signifigant difference???...in performance, engin wear etc.
 
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