There is an answer to a question in the latest Consumer Reports that has me confused. The question is “Is a certain percentage of synthetic motor oil required for an oil to be called ‘semi-synthetic’?” The answer is “No, standards for oil are based on performance, not formula.” First of all, I do…

Yes, they did answer the question, but–The Devil is in the details. If a motor oil is labeled “synthetic”, then it is, by definition, 100% synthetic. However, the question concerned “semi-synthetic” motor oil, and in that case, the exact proportion of synthetic oil to mineral-based oil varies from…

“Yes, they did answer the question, but–The Devil is in the details.” I don’t see the answer the way you do. A correct answer would have been - 'In order for oil to be called semi-synthetic. it has to be at least ___% synthetic oil. They seem to be answering a different question than the one that…

“'In order for oil to be called semi-synthetic. it has to be at least ___% synthetic oil.” Please fill in the blank! What is the minimum percentage of synthetic oil that is required in order for an oil to be called semi-synthetic? Inquiring minds want to know.

Most sources I’ve researched say semi-synthetic oil is oil that is no more than 30% synthetic. Here’s a link to one source - http://en.wikipedia.org/w/index.php?title=Special%3ASearch&search=semi-synthetic+oil ]

A correct answer would have been - 'In order for oil to be called semi-synthetic. it has to be at least ___% synthetic oil There is no standard as to what ratio of Synthetic/Regular Dino oil is. If there’s ANY regular dino oil then it’s semi-synthetic. Most of the semi-synthetic oil is about 20% s…

"There is no standard as to what ratio of Synthetic/Regular Dino oil is. If there’s ANY regular dino oil then it’s semi-synthetic. Then wouldn’t you agree that CR should have given your answer rather than referencing API performance standards? Or at least they should have included the information …

I have never seen a container of motor oil labeled 'Semi-Synthetic"…You are confused because the subject of your thread does not exist…However, “Synthetic Blend” products do exist, more a factor of shelf-space than anything else since NO car maker requires “synthetic blend” oil. If a car maker has …

I have never seen a container of motor oil labeled 'Semi-Synthetic"…You are confused because the subject of your thread does not exist… There are a few oils that are labeled “semi-synthetic.” ‘Lucas’ is one of those brands you would see if you googled it. But it’s really just a matter of how the …

Consumer Reports should stick with washing machines and house paint durability… “Synthetic Blend” motor oils are a USELESS product. The consumer has no way of telling what the “blend” is, what the percentages are, or what the seller was trying to achieve by mixing mineral and synthetic base stocks.…

Confused by an Oil Question & Answer

Maintenance/Repairs

missileman February 11, 2012, 9:31pm 8

I have to agree with the previous posts. If the synthetic oil has ANY mineral oil in it then it’s semi-synthetic and should not be used in the place of synthetic oil. Consumer Reports answer is incorrect in my opinion. They sometimes get it wrong and they are wrong in this instance or they simply did not understand the question.

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Confused by an Oil Question & Answer

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