golly... the 96 test was about adding moly to the taxi cab fleet vrs off the shelf oils if i remember correctly. and the moly additives did not change the wear as the normal oil already had some moly, phospherous and other high wear additives... unless your test was not the "consumers report" taxi cab tests on the chevy 350 engines. Seems like the checker cabs ran the chevy 350 engine at that time.
the group III oil comes from hydro treating the base oil stock to remove all the parrafins, all the waxes, all the lighter aromatics and leaves you with an ultra pure, single molecule structure, that performs almost identical to the group IV molecule that is made from natural gas.. .yes group IV oils comes from natural gas... and since the group III ultra pure molecule is not found in regular oil and is only obtained via heating up the oil in a hydrogen atmosphere, its considered a man made molecule and therefore its synthetic. (the companies went to arbitration on the law suit)
tests show the performance is almost the same as group IV and its much cheaper.
as to Europe, chevron(american) invented the process and licensed it to anyone,, and at that time only american refiners decided to buy the license, then built out the additional equipment to produce the special group III oil. This was because the american market had more cars that required a better oil and americans had the money to buy the better cars, and pay for the better oil. So when europe needed the better oils they simply jumped to the group iv bases as their refineries are not equipped to produce the group III oils, so the simply bought the raw group iv oils. Europe had a smaller middle class so most folks drove very simple cars and only the very rich drove the high end cars that called for the full synthetic oils. Therefore historically they have only bad, poor oils or really really great super high end oils.. They have no middle or high range oils nor can their refineries produce these oils.
So.. you can study the history or rewrite facts.. The european acea ratings are in most cases very close or identical to the api tests procedures except they have no middle ratings.. when I say middle, I mean oils that will perform perfectly in a modern engine vrs a group iv oil that performs slightly better. You can go the api or acea sites and look at the various wear tests and see how the different oils perform and compare them. even japan has the jasso oil ratings which parallel the other two testing agencies. See how each oil performs, how group II conventional oils perform, the group III oils and then groupIV oils work. It will amaze you. Group III hd oils in america are delivering up to a million miles between overhauls on heavy duty over the road diesels today. They used to be the best oil money could buy till tier 4 emissions came to the diesel industry and now these oils have lowered the anti wear additives to keep from foul up the catalytic converters, So now the oils group III and group IV both have lowered their ability to protect your heavy duty engines in favor of emissions. If you research hd oils, you find that both group III and group IV oils both perform very well and are almost identical in performance.
So... if you discount group III oils, your making a big mistake by listening to the hype!!!!!
Do the research your self. The web sites are there and open.
go back to 1959 when we were all group II oils and follow the progression of american oils. See where the multi weight oils could only come on line with either group III or group IV bases added. As the group III oils became perfected, the american market had a whole range of great "middle" oils that the europeans did not have.
the cold start cam failures in the 70s from gm engines, the cam follower wears from mac engines. the top ring coking problem was identified and new additives added to get around this. Each of the api test are actually based on a identified problem and the test was based on the actual engine that failed or a modification test based on that failure. Look at each test procedure and which engine its based on. Its a history book of american oil development. And yes group III oils are very very very good oils if you look at the api test results and not on marketing bullcrapola
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