Motorcraft oil question

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Not certain, but I don't think anyone can say for sure. There's a lot of speculation, but manufacturers won't typically give that information. I hear anywhere from 10% to as much as 50%, but others have said typical is more in the 18-25% range.

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I've heard/read here the Motorcraft is as much as 50% Group III.

It's the only major oil company (Conoco) that offers this much - to my knowledge. Supposedly, alot of the base oil comes from Korea.
 
The only resource I have found so far is from Wilkapedia.

Semi-synthetic oil

A semi-synthetic oil (also called synthetic blend) is a blend of mineral oil with no more than 30% synthetic oil. They are designed to provide many of the benefits of synthetic oil without matching the cost of pure synthetic oil. MOTUL introduced the first semi-synthetic motor oil in 1966.[citation needed].

Hopefully someone can find something better.
 
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The only resource I have found so far is from Wilkapedia.

Semi-synthetic oil

A semi-synthetic oil (also called synthetic blend) is a blend of mineral oil with no more than 30% synthetic oil.




That's great! So Wilkapedia says 31% is full synthetic - since their ceiling on syn-blends is only 30%???

Is "Wilka" a long, lost beaten stepchild of Encyclo??
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That's great! So Wilkapedia says 31% is full synthetic - since their ceiling on syn-blends is only 30%???










So lets see if I have this right...

Under some of the naming systems used to describe 'synthetic' oil, we might have an oil which contains 31% of Group III and 69% Group I or II, and it could called 'fully synthetic'.

Another oil could be 100% Group IV and Group V ...and it would also be called 'fully synthetic'.

Does anyone see a problem with this?
 
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So lets see if I have this right...

Under some of the naming systems used to describe 'synthetic' oil, we might have an oil which contains 31% of Group III and 69% Group I or II, and it could called 'fully synthetic'.

Another oil could be 100% Group IV and Group V ...and it would also be called 'fully synthetic'.

Does anyone see a problem with this?




I do! I do!
 
Just the percentage of GIII can be misleading. Thats assuming you are attempting to judge basestock quality.
I submit the following for consideration.

1. A popular 5W-20
40% GII (102 VI)
60% GIII (122 VI)
Average 112 VI

2. Another popular 5W-20
80% GII+ (116 VI)
20% GIII (147 VI)
Average 122 VI
 
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