Looking for shear stable 5W-30 Oil

Pennzoil motor oil
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Originally Posted By: Swift101
I've been looking at a lot of used oil analysis lately and it appears almost all turbo di engines shear oil down quickly.

I'm considering trying Castrol Edge with titanium (Gold Bottle) or Mobil 1 Extended Performance. Is there any reason to believe these oil will stand up better to shearing? I'll be taking a long road trip over the summer (around 4000 miles) and I want to use something that will give me piece of mind.

-Thanks


If you are genuinely concerned about shearing, and you want to stick with a low SAPS 5w30, you could try a low SAPS Euro 5w30 like Quartz Ineo 5w30 Long Life, Mobil 1 ESP, Castrol SLX Professional LL, Motul 504/507, Liqui Moly 4200, etc...
I work in Hyundai service, and have not had any engine issues with the GDI turbo motors running Gulfpride Advance Fuel Efficient 5w30 Part Synthetic.
I recommend oil change intervals remain at 5000 or under no matter what oil you use. Mobil 1 Extended Performance and Castrol EDGE Extended Performance will not solve your shearing or fuel dilution concerns. It is the nature of this engine configuration.
 
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If you're doing 3.5K drains, I doubt that it matters.
Double that OCI and it might.
I don't think that turbo DI engines mechanically shear their oil so much as they fuel dilute it.
You'll see a loss of viscosity either way, but unless every one of those 3500 miles involves short trips on a cold start, I don't think you need worry very much about your oil choice.
Incidentally, Valvoline Maxlife seems to deal with fuel dilution pretty well, or at least that was what it looked like in this UOA:
 
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I have done calculations of Temporary Shear Ratio over the past few years, and assuming that the higher the TSR, the lower the permanent shear will be, I have some favorites:

Old RedLine 5w30 was basically shear-proof before they reformulated it last year. The new one, maybe not as good.

PU is about the best of the commonly available synthetics.

Joe Gibbs Driven LS-30 is the best that I know of right now.

AMSoil HDD is really, really good.

It's almost impossible to calculate TSR for anything made by Castrol because they don't put the necessary data on their PDS's. You have to go on European Castrol sites to seek out the data.
 
I have noticed in testing that almost all multi-viscsoity oils shear down very rapidly in use. However most also oxidatively thicken in use. After about 200 miles the thickening overtakes the shearing and the oil viscosity is as new. From that point onwards the used oil is usually thicker than new oil.
 
After 200 miles?
I can't imagine that much shearing and then that much oxidative thickening that early in an OCI.
Most used oil analysis don't show significant oxidation after a considerable multiple of 200 miles.
 
Originally Posted By: fdcg27
After 200 miles?
I can't imagine that much shearing and then that much oxidative thickening that early in an OCI.
Most used oil analysis don't show significant oxidation after a considerable multiple of 200 miles.


What do the used oil analysis show on viscosity? If it is thicker, how do you account for it?
 
You won't find too many 200 mile used oil analysis, nor will you find very many where the oil is thicker than virgin.
 
Originally Posted By: dubie2003
Save yourself the headache and source something easily found on the road, ie Mobil 1 Extended Performance, Pennzoil Platinum / Pennzoil Ultra, etc... from Walmart.


That's if it's actually on the shelf when you get there.
 
Originally Posted By: Swift101
Amsoil OE, XL or Signature?

Does anyone know or can recommend a distributor?

-Thanks


Shoot me an email when you get a chance. I'm on vacation right now and responding here is tough on my cell. Thanks.
 
Thanks everyone for the input, I'm going to consider my options. I'm not going to lie, Amsoil looks very impressive.

I may try running 5W-40, it seems like a good fit.
 
Just noticed something interesting.

My manual recommends the following oil weights:

fk070o.jpg


But on the next page it says the oil should meet ILSAC GF-4, ACEA A5 or above*3

2nt8v2t.png


So does this mean I can't use products like Amsoil EFM 5W-40 or Pennzoil Ultra Euro 5W-40? Seems pretty confusing.
 
Originally Posted By: Swift101
So does this mean I can't use products like Amsoil EFM 5W-40 or Pennzoil Ultra Euro 5W-40? Seems pretty confusing.

It is confusing, because it's not clear whether it's sufficient for an oil to just be "API SM" certified or whether it needs to be API SM and ILSAC GF-4 and ACEA A5...

If it's the former, then Pennzoil Ultra 5w-40 is API SM certified.


ILSAC GF-4 Xw-40 oils don't exist, AFAIK.
 
It's confusing, I agree. This is some BMW-level contradictory wording, to be frank.

My interpretation: you need to use a 5w30 that meets ACEA A5, GF-4, and API SM. I don't know why 5w40 is on there because it's not possible to be 5w40 and A5.

Fortunately there are tons of good 5w30s that tick all the boxes, so I'd get whichever is on sale.
 
Originally Posted By: Quattro Pete
Originally Posted By: Swift101
So does this mean I can't use products like Amsoil EFM 5W-40 or Pennzoil Ultra Euro 5W-40? Seems pretty confusing.

It is confusing, because it's not clear whether it's sufficient for an oil to just be "API SM" certified or whether it needs to be API SM and ILSAC GF-4 and ACEA A5...

If it's the former, then Pennzoil Ultra 5w-40 is API SM certified.


ILSAC GF-4 Xw-40 oils don't exist, AFAIK.


Yeah I just read a few posts saying how the manual for this car gives conflicting information. It seems running a 40 weight wouldn't cause any problems, the specs they mentioned seem to be related to fuel economy.

My plan is run a 40 weight in the summer and 30 in the winter. But then again they both have a cold weight of 5W so it wouldn't make much a difference.

Honestly I know I'm over analyzing this, I think it's safe to try 5W-40. If it doesn't kill my fuel economy (which I doubt) and provides nice UOA results then I don't see a reason why not to use it.

I'm mostly interested in maximum wear protection.
 
Originally Posted By: Swift101
I think it's safe to try 5W-40. If it doesn't kill my fuel economy (which I doubt)

If you're currently running an energy conserving oil, then I would expect a 5w-40 to impact your fuel economy. To what extent? No idea.
 
For everyone using 5W-40, have you noticed a significant drop in fuel economy when compared to 5w30?
 
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