Too much time on my hands...

[Pete591]

BMW...Porsche'...Audi..VW...Mercedes...Ferrari...0W-40 wt oil.

Ford..Chrysler..Dodge..Jeep...Honda...most Japanese for that matter...0W-20

GM..5w30


Why is it ...the more I think about it...0W-40 makes more sense overall than not?

All car companies have the same concerns about mileage..etc...there is not much real difference between say a Honda V-6 10:1 compression tight tolerance engine and a Mercedes engine at the same compression.

I think 0W-40 synthetic oil is the best choice across the board
and it can be used for out to 10,000 miles with a good oil filter.

Lots of room if you get some shear during an extended use period...will start when it's cold out...protect when it's hot...I feel it's the oil for the person wanting to get the least wear and longevity out of today's engines.

I am not bashing 5W-20...not bashing 5w30...just saying that I know for a fact that 0W-40 (M-1) holds up extremely well in my Porsche' Turbo and it gets changed every 8,000 miles. It's a Turbo thing.

My new Honda LX SE V-6 got it's oil changed to Mobil 1 0w40 and after 800 miles...the car still gets 30 mpg on the hwy at 70 MPH and city is 23 mpg. No improvement or loss with 0W-40. I think the German's found that out first...and it decreases wear too I'll bet vs. a 5W-20.

I think there are more myths about 5W-20's... than facts.

0W-40 synthetics level the paying field between mileage and engine protection! You don't have to give up one in order to gain the other.

My .02

 

[LS2JSTS]

I'd run Mobil 1 0w40 or GC 0w30 in everything I own, if I didn't have any concerns for existing warranties.

 

[barlowc]

Originally Posted By: Pete591
I think there are more myths about 5W-20's... than facts.


Honda's done an s-load of research/testing and stands behind 5W-20 for most of their modern engines, so I have to believe there's more than myth.

 

[Pete591]

Originally Posted By: barlowc
Originally Posted By: Pete591
I think there are more myths about 5W-20's... than facts.


Honda's done an s-load of research/testing and stands behind 5W-20 for most of their modern engines, so I have to believe there's more than myth.


Researcher's (having been one in pharmaceutical's)usually show findings that agree with management...for some reason...and corporate sponsorship as well...believe it or not...down play the side-effects and play up the efficacy. Knowing there may be losses...but try to anticipate them if you can...that's usually the strategy.



...and to keep a car in warranty...like they would really check viscosity anyways...all the car needs in it is oil.

0W-40 or 0w30 are both ...improvements... over a 5W-20...

 

[Hermann]

For cold starts yes. For other things not so sure.

 

[ekpolk]

Originally Posted By: Pete591
. . .
I think there are more myths about 5W-20's... than facts.
Yes, this would be one of them:

Originally Posted By: Pete591
0W-40 synthetics level the paying field between mileage and engine protection! You don't have to give up one in order to gain the other.


And this would be another:
Quote:
I think the German's found that out first...and it decreases wear too I'll bet vs. a 5W-20.


Good grief – we’re now a full decade into the move toward 20 wt oil by mainstream manufacturers. It should be pretty clear by now, as the junkyards fail to fill with 20-wt-destroyed engines that these oils are working just fine in those engines appropriate to their use. Beyond that, it’s pretty evident that, especially when cold, these oils flow better than their thicker counterparts, delivering lubrication more quickly, and shortening the time during which the engine must rely upon the AW additives clinging to metal.

At the end of the day, taking away the initial disbelief factor that seemed to stick to the 20 wt oils when Ford and Honda first went that way, it is evident that a wide range of oils and grades will work in most engines. You should use the oils that the Porsche engineers spec for that engine. If you want to gamble your wty coverage on your Ford, well, go for it and put 40 in it too. Your call, but OTOH, the evidence pretty well shows that the 20s will do fine there (without wty risk).

 

[Old Mustang Guy]

I just think that in some cars the 0W40 would not be a good choice, although it probably wouldn't hurt anything. My Fords, a 4.6 and a Duratec run great with 5W20. I wouldn't run anything else.

 

[Boss302fan]

I recently read somewhere on this site that Ford is recommending 10W40 for their newer V8 engines that come back with consumer complaints about excessive engine tick/knock...

I also have no doubt that in a Honda engine with over 100K miles a good choice would be a 0W40 oil. Light weight oils do offer slight fuel economy benefits and Ford, GM, Honda, etc love this because they have to meet certain US fuel economy standards. With some miles and wear on an engine going to a 30 or 40 weight may be the way to go.

Over all, I really think heavier weight oils will help an engine last longer...