Would 5W-20 Synthetic BLEND = 10W-30 FULL SYN?

[Robert_Gift]

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...Plus less out of service time.

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Funny!
Seems almost everytime I am on my back in the gutter under the Expedition changing the oil, a hospital calls.
(Or neighbor's sprinkler water comes down the dry gutter into my shirt neck.)
I keep toilet paper at the ready so I don't get dirty oil from my hands on the cell phone. Then I have to hurry with the change.
So, I have everything set up.
New filter oiled to screw on.
Oil plus extra amount for filter ready to pour in so I don't worry if I have installed enough.
Then, AFTER the delivery, I get to check the oil and check that there were no leaks around the filter gasket.
Makes me paranoid.

 

[oilyriser]

If it needs to be ready to go right away, in all kinds of weather, then any 0w30 or 0w20 would be excellent. If the battery happens to be drained one very cold day, the 10w30 might keep it from starting.

 

[Robert_Gift]

Quote:

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If it needs to be ready to go right away, in all kinds of weather, then any 0w30 or 0w20 would be excellent. If the battery happens to be drained one very cold day, the 10w30 might keep it from starting.

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Thanks.
Luckily, it rarely gets too cold here in Denver. It is always garaged when possible.
When outdoors, I park facing away from the wind. If snowing, I cover the windshield and light bar with a sheet
so I don't have to spend time cleaning and scraping windows.
I will try to find the 5w30 Wal-mart Full synthetic oil.
I don't think they have 5W-20.
Will use up the rest of the Motorcraft 5W-20 blend.
But now, after what you all have said here, I wonder if I should just get MC 5W-20?
But I thought Full Synthetic 10w30 was "thinner" (flows better with less resistance) than Blend.

 

[Blue99]

For better gas mileage, 1-3%, by all means use the MC 5W-20 motor oil, especially if you are running short trips of 1-10 miles in the Denver cold weather.

I think what's confusing for you is the term "synthetic" on the label of the Walmart oil.

This is formulated from low cost Grp III base oils and does not have the film strength & performance advantages of a XHVI Grp III or a true PAO based synthetic.

Low cost Grp III's are Grp II+ base oils that spend more time in the hydro-isomerization process to upgrade the wax into functional base oil hydrocarbons.

While, I'm not knocking the Walmart Synthetic formulation, to some it does not meet the definition of a true synthetic and simply is a high grade dino/conventional formulation.

Motorcraft 5W-20 synthetic blend is a proven performer in the Crown Vic 4.6L police vehicles, so use it with confidence.

 

[oilyriser]

5w30 or 10w30 depends on the thickness at ceratin low temperatures, so it doesn't matter if it's synthetic or not.