Lubricant composition having a base oil and one or more additives, wherein the base oil has been obtained from waxy paraffinic fischer-tropsch synthesized hydrocarbons

1. A lubricant composition comprising a base oil and one or more additives wherein the lubricant composition has a kinematic viscosity at 100° C. of more than 5.6 cSt, a cold cranking simulated dynamic viscosity at −35° C. according to ASTM D 5293 of less than 6200 centiPoise (cP) and a mini rotary viscosity test value of less than 60000 cP according to ASTM D 4684, wherein the base oil has been obtained from waxy paraffinic Fischer-Tropsch synthesized hydrocarbons, the base oil comprising at least 98 wt % saturates, the saturates comprising between 10 and 40 wt % cyclo-paraffins comprising a weight ratio of greater than 3 of 1-ring cycloparaffins relative to cyclo-paraffins having two or more rings.

2. The lubricant composition of claim 1 , wherein the base oil has a pour point of less than −39° C. and a kinematic viscosity at 100° of between 3.8 cSt and 5.5 cSt and the lubricant composition has a kinematic viscosity at 100° C. of between 9.3 cSt and 12.5 cSt.

3. The lubricant composition of claim 1 , wherein the lubricant composition comprises less than 10 wt % of an additional base oil.

4. The lubricant composition of claim 3 , wherein the lubricant composition comprises no additional base oil.

5. The lubricant composition of claim 1 , wherein the saturates comprise between 12 wt % and 40 wt % of cyclo-paraffins.

6. The lubricant composition of claim 1 , wherein the weight ratio of 1-ring cyclo-paraffins relative to cyclo-paraffins having two or more rings is less than 15.

7. The lubricant composition of claim 1 comprising a motor oil having a grade of 0W-x, wherein x is 20, 30 or 40.

8. The lubricant composition of claim 1 wherein the base oil comprises:

less than 1 wt. % aromatic hydrocarbon compounds;

less than 20 ppm sulfur; and,

less than 20 ppm nitrogen.

9. The lubricant composition of claim 8 wherein the base oil comprises less than 0.5 wt. % aromatic hydrocarbon compounds.

10. The lubricant composition of claim 8 wherein the base oil comprises less than 0.1 wt. % aromatic hydrocarbon compounds.

11. A passenger car motor oil comprising a base oil and one or more additives wherein the motor oil composition has a kinematic viscosity at 100° C. of more than 5.6 cSt, a cold cranking simulated dynamic viscosity at −35° C. according to ASTM D 5293 of less than 6200 centiPoise (cP) and a mini rotary viscosity test value of less than 60000 cP according to ASTM D 4684, wherein the base oil has been obtained from waxy paraffinic Fischer-Tropsch synthesized hydrocarbons, wherein said motor oil has a grade of 0W-X, wherein X is 20, 30 or 40, the base oil comprising primarily saturates, the saturates comprising between 10 and 40 wt. % cyclo-paraffins comprising a weight ratio of greater than 3 of 1-ring cyclo-paraffins relative to cyclo-paraffins having two or more rings.

12. A heavy duty diesel engine oil comprising a base oil and one or more additives wherein the diesel engine oil composition has a kinematic viscosity at 100° C. of more than 5.6 cSt, a cold cranking simulated dynamic viscosity at −35° C. according to ASTM D 5293 of less than 6200 centiPoise (cP) and a mini rotary viscosity test value of less than 60000 cP according to ASTM D 4684, wherein the base oil has been obtained from waxy paraffinic Fischer-Tropsch synthesized hydrocarbons, wherein said motor oil has a grade of 0W-X, wherein X is 20, 30 or 40, the base oil comprising primarily saturates, the saturates comprising between 10 and 40 wt. % cyclo-paraffins comprising a weight ratio of greater than 3 of 1-ring cyclo-paraffins relative to cyclo-paraffins having two or more rings.