oil shelf life?

1slow370

actually it isn't just ester oil they recomend if you read the technical papers or hell the patent aplication you find out that nissan is using a special ester different from the ester used in ester oils in the amount of .5-1.5 percent. The ester used in the nissan oil has no lubrication properties but instead works to glue the oil molecules to the hydrogen free diamond like coatings on the bearings in the vvel system. In the patent application it goes on to explain that any quantities greater than 1.5% of the special ester will dramaticly reduce friction up to 5% but at the cost of water being absorbed into the oil from the atmosphere thus destroying the life of the oil and it's lubricating abilities. Which is why nissans ester oil is actually a conventional oil because over time the esters draw in water vapor reducing their effectivness meaning the oil has to be changed more often anyway. There is only a 7 year 100,000 mile powertrain warranty anyway so there wasn't really a reason for nissan to spend more on making the ester oil synthetic based so what you buy is essentially a 3 dollar quart of oil with 10ml of alcohol based ester that costs an additional $9. Biggest scam ever.