Two-cycle lubricants comprising estolide compounds

1. A two-cycle lubricating composition comprising:

(i) about 40 to about 50% by weight of an estolide base oil having a kinematic viscosity of about 4 to about 10 cSt at 100° C., said estolide base oil comprising at least one estolide compound selected from compounds of Formula I:

wherein

x is, independently for each occurrence, an integer selected from 7 and 8;

y is, independently for each occurrence, an integer selected from 7 and 8;

n is an integer selected from 0, 1, and 2;

R 1 is an optionally substituted C 1 to C 22 alkyl that is saturated and unbranched; and

R 2 is an optionally substituted C 1 to C 22 alkyl that is saturated and branched,

wherein each fatty acid chain residue is unsubstituted;

(ii) about 3 to about 6% by weight of at least one detergent comprising an overbased calcium detergent;

(iii) about 23 to about 27% by weight of at least one viscosity modifier comprising a polybutene polymer;

(iv) about 23 to about 27% by weight of at least one solvent comprising a petroleum solvent or synthetic hydrocarbon solvent, and

(v) at least one antioxidant,

wherein said composition exhibits a JASO M 343 Exhaust Blocking Index of at least 90.

2. The two-cycle lubricating composition according to claim 1 , wherein the estolide base oil has a kinematic viscosity of 6.5 to 10 cSt at 100° C.

3. The two-cycle lubricating composition according to claim 1 , wherein the polybutene polymer comprises a poly-n-butenes and/or polyisobutylenes having a number average molecular weight of 300 to 1500.

4. The two-cycle lubricating composition according to claim 1 , wherein the at least one solvent comprises a petroleum solvent or synthetic hydrocarbon solvent, said at least one solvent having a boiling point not higher than 380° C. at atmospheric pressure.

5. The two-cycle lubricating composition according to claim 1 , wherein the at least one antioxidant comprises an aminic antioxidant.

6. The two-cycle lubricating composition according to claim 5 , wherein the aminic antioxidant comprises a diarylamine antioxidant.

7. The two-cycle lubricating composition according to claim 1 , wherein R 2 is selected from C 6 to C 12 alkyl.

8. The two-cycle lubricating composition according to claim 1 , wherein the estolide base oil exhibits an iodine value equal to or less than 15 cg/g.

9. The two-cycle lubricating composition according to claim 1 , wherein the estolide base oil exhibits an iodine value equal to or less than 10 cg/g.

10. The two-cycle lubricating composition according to claim 1 , wherein the estolide base oil has an EN that is an integer or fraction of an integer selected from 1 to 1.5.

11. The two-cycle lubricating composition according to claim 1 , wherein the estolide base oil has an EN less than or equal to 1.6.

12. The two-cycle lubricating composition according to claim 1 , wherein the detergent comprises an overbased calcium detergent having a total base number of 150 to 450.

13. The two-cycle lubricating composition according to claim 1 , wherein the at least one antioxidant is present in an amount of 1 to 2% by weight.