I was offended by this WSJ "article". Actually it is an info-mercial that simply repeats the seller's propaganda. No documentation of claims and testimonials only from its distributors. Do you really believe that finer filtration will improve MPG by 5%? If that were true, max HP would go way up, too. But MPG does not decline with oil age. When you read the abstract of the SAE papers that they quote as support, it is clear they are misleading. The SAE papers say that poor filtration leads to engine wear and worn out engines don't get as good as MPG. Ya think? Papers don't say 2+ micron concentration increases friction and immediately lowers MPG.
Others have gotten similar long mileage results by replacing regular filters. I can send the cites. As long as you don't make a lot of short trips, the oil does not become acidic and between normal losses and losses associated with filter replacements, you are adding enough replacement oil to replenish additives.
Even if all they say if true, its cheaper to just change your own oil on a normal schedule. And as far as the "green aspect", few things are more easily recycled than oil, except water. So frequent oil changes, do not conserve oil, only reduce the amount of used oil sent back to the refinery.
I challenged them to document claims with oil analysis comparisons. I am still waiting.
