This is just the first test in row of tests oils will be put to. VOAs and some UOAs will follow. It seems GC may be added too. The majority of oils were supplied by car enthisiasts. The community also donated and helps to perform these tests. Some oils and another part of financing are provided by a technical center which has originated this study.
The purpose is to understand oxidation resistance of actually available oils (including OEMs oils vs. claimed brand analogues) in view of supposed considerable contribution of this factor to sludge and varnish in many gasoline engines, especially hot running ones, under sever conditions like numerous traffic jams in winter and summer time, and widely promoted extended OCIs (in case of E.Europe region it means over 10K km, but not more than 20K km).
Particularly in this test oils were exposed to 400C during 1 hour. Though there are some parts where oil touches surfaces heated to about 400C, this temperature was simply used to speed up the process. Personally I think 200C or, at the outside, 250C would be more appropriate, but most likely in the framework of financing and time it would be very difficult, if impossible, to do. At the same time results themselves are very interesting and illustrating. After exposure to heating oils break down to phases. Polymerized residue in the flask and residue in the snout this is what is often found under the cover. The biggest surprise is how bad some OEM oils performed. Also interesting that all North American oils tested till now performed really well. But the biggest enigma is performance of mineral Lukoil and one of the guesses is that in reality the stuff is better that it's claimed on the label.
For the moment only a part of all oils were exposed to 400C, so results with others (suppose over 70 in total) will be displayed upon fullfilment of lab tests.
The purpose is to understand oxidation resistance of actually available oils (including OEMs oils vs. claimed brand analogues) in view of supposed considerable contribution of this factor to sludge and varnish in many gasoline engines, especially hot running ones, under sever conditions like numerous traffic jams in winter and summer time, and widely promoted extended OCIs (in case of E.Europe region it means over 10K km, but not more than 20K km).
Particularly in this test oils were exposed to 400C during 1 hour. Though there are some parts where oil touches surfaces heated to about 400C, this temperature was simply used to speed up the process. Personally I think 200C or, at the outside, 250C would be more appropriate, but most likely in the framework of financing and time it would be very difficult, if impossible, to do. At the same time results themselves are very interesting and illustrating. After exposure to heating oils break down to phases. Polymerized residue in the flask and residue in the snout this is what is often found under the cover. The biggest surprise is how bad some OEM oils performed. Also interesting that all North American oils tested till now performed really well. But the biggest enigma is performance of mineral Lukoil and one of the guesses is that in reality the stuff is better that it's claimed on the label.
For the moment only a part of all oils were exposed to 400C, so results with others (suppose over 70 in total) will be displayed upon fullfilment of lab tests.
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