Originally Posted by Voyager
I would like to know the source of your information on molecule size of synthetic vs. dino. I have never seen this claim before and actually nearly the opposite. Dino oil has a wide range of molecule sizes whereas synthetic has much more uniform molecules. However, one of the issues with dino is that at high temps the smaller molecules burn off being more volatile than the large ones. I find it hard to believe that synthetics could both have very small molecules yet also have much better high temp performance. However, I am always open to new data, but what you posted here is contrary to everything I have read about synthetics.
I was merely speaking from personal experience.
In my other life, I was a technologist at factory--one of our machines was cammed at such high angle, that direct injection of oil-using 5 spray nosels was required to keep this machine from over heating and shuting down from expension. We have gone through 55 gallons of high quality oil every few weeks. I had never even heard about synthetic oil at that time ( 35-40 years ago) It was Duboi Chemicals that introduced me to their newly developed synthetic, with documentation to their test data and theory, backed by microscopic pictures and wear data,
I gave it a try and low and behold, not only did our consumption of lubricant went down by 75% , but the normal tear down to clean the equipment went from every 3 months to once a year. Furthermore, the spent oil which was collected, was so clean after settling, that we re-used 70% of it, versus the mineral which had to be discarded.
Granted, this was not in a motor but in a very sophisticated high speed manufacturing machine, running 24 hrs a day.
The main drive systems, where a motor..turning a main drive shaft and this shaft being supported withinn brass bushings, similarly, the life of these bushings were extended x4, once switched to synthetic lubrication.
Is there a difference amongst the synthetics? Quite possibly--I don't really know.
This is all I can offer you