XD3 0w40 ok for 3.1 and 3.4 GM engine?

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Very true and I understand your point, but with XD3 being almost half the price I can't see anough difference to go to the Mobil 1.
 
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But it sure wouldn't be my first choice as a winter use oil. As you say it is a heavy 30wt oil. Mobil 1 5W30 is considerably lighter and more commonly available. Even Mobil 1 0W40 would be a better choice (price aside) being lighter at sub 0deg'C temps' than XD-3 0W30.
The best choice in a 30wt would be Mobil 1 0W30 which has a cSt of only 1995 @-20C.

Your reasoning is my justifcation for using Mobil 1 0w30 in my 1zzfe engine this winter. I have a supply of GC, XD 0W-30, Mobil 1 0W30 and Mobil 1 5w30. Ill break out the GC and XD closer to spring...although I am confident of their protection anytime in the year
 
Anyone know what the HT/HS is of XD-3 0W30 & 0W40, I can't seem to find it anywhere?
BTW, the popular grades of M1 (5W30 & 10W30) frequently go on sale. I picked up 5.4l for $29.99 @ CDN Tire a week or so ago which narrows the price difference to XD-3.
 
True, but the 8 bucks difference pays for the filter and a couple Tim Hortons coffees for that day.
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Caterham, going from memory but I think HTHS of XD-3 0W30 and 0W40 are 3.6 and 4.2, respectively.

If you do a search "XD-3 HTHS" you'll find it.
 
bernhardschau.

For your smart, use the Esso XD3 0w30. It is the relative same thickness as the Mobil 1 0w40.
 
bernhardschau;

Walmart only sells the XD 0W40.
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Of the XD-3 line, only the 0W30 and 0W40 are PAO synthetics, as per the spec sheet.
 
bernhardschau,

There are other XD3s but they are not syntheitc other than the 0w30 and 0w40.

Go to you local Essor distribution center and you will get a better price on the 0w30.

That way you will get the best fuel economy possible and amazing protection.
 
BlazerLT

Coffee and donuts notwithstanding, if cost is the issue Mobil 1 5W30 is still a better choice simply because it is lighter and viscosity requirements are more than adequately being met; consiquently there is less wear and you're saving on fuel.How much you're saving I don't know, but I would hazard a guess that it is many times 8 bucks over an OCI.
But why stop there, Mobil 1 0W30 is lighter still with even more benefit; heck I'm prepared to posit that the best oil would be Mobil 1 0W20 closely followed by Mobil 1 5W20 if you can't get the 0W20. One of the biggest problems in winter is getting the oil up to temperature so unless one is seeing oil temps' consistently above 190 deg'F viscosity requirements are being met.
As a point of interest, if Dr. A.E. Haas can safely use Mobil 1 0W20 in the summer in Florida in his 550 HP Ferrari Maranello then 99.99% of us up here in the great white north would be better of using it.
 
Since so many mfrs, i.e. Honda & Ford, are specifying 20wt oil, I'm sure it is just a matter of time before ESSO comes out with an XD-3 0W20 grade. If they keep the price @ 4 bucks a litre we will have a true bargain. In fact I think I'll contact them about it!
 
Well, I would honestly use Mobil 1 but it is just too expensive when I can use the Esso XD3 which has an amazing additive pack and real robust TBN that I need in my climates.

I understand what you are saying, but even German Castrol has the same relative viscocity as the XD3 and it is perfectly fine as well.

I would go lighter, but my engine has over 135,000miles on it and I don't want to go too thin.

I just want a reasonably priced PAO synthetic oil to allow my truck to last as long as possible.

I just honestly cant see the point to going to Mobil 1 and get a weaker additive package at a higher price.

I have the ability to buy it so I might as well take advantage of it. So many people in the US would love to be able to buy it.

Also, I doubt it will be made in 0w20 seeing XD3 synthetic is a heavy duty oil targeted towards heavy machinery use rather than standard vehicles. Not saying it can't be used though. I love the stuff.
 
You say XD-3 has a superior add' pac. Actually that is one thing that concerns me about it vrs' M1. It contain no Moly like M1 or Magnesium-Complex Esters like GC; so what polar elements is it using?
I do hope they are considering a 20wt PAO; they already have a 10w20 and 20w20 conventional diesel. It is worth enquiring about.
 
I wouldn't run an Xw40 in a 3100/3400/3800 pushrod motor even down here unless I had a very specific reason to do so. Stick with the 0w30, XD3 0w40 won't kill your motor, but the 0w30 is better for it especially in that climate.
 
I am a real fan of the Calcium, zinc, and phosphorus concentrations that allow this long life oil to protect far beyond your standard oil change interval.

The PAO base oil is the key to not really needing a moly additive and also this is a high detergent synthetic made for strong oxidation stability and strong anti-wear and corrosion protection.
 
What? Since when does "all seaons" have to do with the motor oil?

I really hope you are joking because that is a ridiculous reason to use a 0w40 over a 0w30.
 
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