Graph 3. Group I Dry TOST Results.


Lube-Tech


PUBLISHED BY LUBE: THE EUROPEAN LUBRICANTS INDUSTRY MAGAZINE


No.120 page 5 Conclusions


The data shows that the AO system for the different base oils requires selecting the correct type and combination of AO. The data illustrates that using a combination of DTC tolutriazole AO provides the best performance from Group II base oils and long life in the dry TOST. From Table 2 we can see that the formulations 7 & 8 are the best performing oils which lasted greater than 10,000 hours with no discoloration, precipitation of solids or increase in viscosity. The sulphur & nitrogen chemistry of DTC/TD yields the best AO performance in the dry TOST testing with these Group II base oils.


The Group I base oils tell a slightly different story. In order to get the best level of performance, different additive chemistry types and treat rates need to be adjusted for optimal protection against oxidation.


Table 5. Group I Dry TOST results.


Graph 3. Group I Dry TOST Results 30 LUBE MAGAZINE NO.149 FEBRUARY 2019


Graph 4. Group I Viscosity Change Results


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56