| abstract |
The present invention relates to a lubricating oil composition having improved deposition control capability for engines operating under sustained high load conditions, such as natural gas engines and low speed or medium speed diesel engines. The composition comprises (a) a first base oil component selected from a Group I base oil, a Group II base oil, a Group III base oil or a combination thereof, each having a kinematic to 100 ° C <sp /> from 8.5 to 15 mm 2 / s; and (b) a second base oil component selected from a Group I base oil, a Group II base oil, a Group III base oil or a combination thereof, each having a 100 ° kinematic viscosity C from 4.0 to less than 8.5 mm 2 / s; the weight ratio of the first base oil component to the second base oil component being in the range of 1:10 to 1: 1.15. |