You may be right. Here are tables from
https://patents.google.com/patent/US11078436B2/en, which is probably the newer version:
Table I shows four exemplary formulations and physical data.
TABLE I | | | | |
| | | | |
OIL COMPONENTS | #1 | #2 | #3 | #4 |
| | | | |
| | | | |
Base Oil #1 | Lubrigreen SE7B | 50.00 | 0.00 | | |
Base Oil #2 | Elevance 1119-159 | 0.00 | 50.00 | | |
Base Oil #3 | Priolube 1973 | | | 30 | 50 |
Base Oil #4 | Synesstic 12 | | | 10 | 10 |
Base Oil #5 | PAO 6 | 26.95 | 26.95 | 35.75 | 14.95 |
Base Oil #6 | PAO 4 | | | 2.5 | 5 |
VI Improver 2 | | | | | |
Viscosity Index (VI) Improver 1 | SV 265 | 3.00 | 3.00 | | |
Additive Package 1 | D3495L | 19.30 | 19.30 | | 19.3 |
Additive Package 2 | LZ CV9601 | | | 21 | |
Corrosion Inhibitor | Borate Ester Mix (PX 3871) | 0.20 | 0.20 | 0.20 | 0.20 |
Antioxidant | Irganox L67 | 0.50 | 0.50 | 0.50 | 0.50 |
Antifoam | Chemaloy F-655 | 0.05 | 0.05 | 0.05 | 0.05 |
| Total | 100.00 | 100.00 | 100.00 | 100.00 |
LAB TEST RESULTS | KV100 cSt | 11.36 | 12.21 | 11.95 | 12.05 |
| KV40 | 65.91 | 71.57 | 79.35 | 79.46 |
| VI | 169 | 171 | 145 | 147 |
| CCS@−25 C. | 3622 | 5329 | 6490 | 6820 |
| MRV@−30 C. | 29279 | | 12750 | 14134 |
| Pour Point | −33 C. | −42 C. | −48.00 | −45 |
| PDSC Oxidation (min) | | | 76.22 | 102 |
| Noack Volatility % | 5.83 | 7.63 | 7.14 | 5.4 |
| Base Oil Blend Aniline Point | 67 | 66 | | 62 |
| Base Oil Blend KV100 cSt | 6.23 | 5.89 | 6.93 | 7.26 |
| Total Deposit (mg) | | | | 5.7 |
| | | | | |
In using the formulation of the present invention to free piston rings and remove previously built-up carbon deposits on engine pistons, the oil in the engine is drained and replaced with a formulation having significant solvency, such as one with an aniline point of about 60. The engine is run until the oil needs to be replaced again, which typically is at least 30,000 miles of operation for the diesel engine and 5000 miles for gasoline engine in a vehicle. Once the oil needs to be replaced, it can be replaced with standard engine oil formulation. The benefit of this oil drain is determined by comparing oil consumption in the engine before and after the drain. In field tests improved oil consumption (reduced oil consumption) was found of up to 179% in Class 8 trucks and up to 275% in stationary engine testing of Class 8 engines with previously high deposits and high oil consumption.
Additional formulations are shown in Table II.
| TABLE II | | | | | | | | | | | | |
| | | | | | | | | | | | | |
| #5 | #6 | #7 | #8 | #9 | #10 | #11 | #12 | #13 | #14 | #15 | #16 | #17 |
| | | | | | | | | | | | | |
| | | | | | | | | | | | | |
Base Oil #1 | Lubrigreen SE7B | | | | | | | | | | 68.9 | | | |
Base Oil #2 | Elevance 1119-159 | | | | | | | | | | | 32.3 | | |
Base Oil #3 | Priolube 1973 | | | | | 70.5 | | | | | | | | |
Base Oil #4 | Synesstic 12 | | | | | | | | | | | | | |
Base Oil #5 | PAO 6 | 57.9 | 42.4 | 36.3 | 31.9 | 10.2 | 80.7 | 39.65 | 39.65 | 22.3 | 11.8 | 48.4 | 40.35 | 40.35 |
Base Oil #6 | PAO 4 | | | | | | | | | | | | | |
Base Oil #7 | Esterex NP343 | 22.8 | | | | | | | | | | | | |
Base Oil #8 | Esterex A51 | | 38.3 | | | | | | | | | | | |
Base Oil #9 | Esterex NP 451 | | | 44.4 | | | | | | | | | | |
Base Oil #10 | Dow Symbio PB 46 | | | | 48.8 | | | | | | | | | |
Base Oil #11 | OSP 32 | | | | | | | 40.35 | | | | | | |
Base Oil #12 | OSP 46 | | | | | | | | 40.35 | | | | | |
Base Oil #13 | Hatcol 2352 | | | | | | | | | 58.4 | | | | |
Base Oil #14 | Hatcol 2926 | | | | | | | | | | | | 40.35 | |
Base Oil #15 | Hatcol 2999 | | | | | | | | | | | | | 40.35 |
VI Improver 2 | | | | | | | | | | | | | | |
Additive Package | D3495L | 19.3 | 19.3 | 19.3 | 19.3 | 19.3 | 19.3 | 19.3 | 19.3 | 19.3 | 19.3 | 19.3 | 19.3 | 19.3 |
1 | | | | | | | | | | | | | | |
Borate ester mix | | | | | | | | 0.2 | 0.2 | | | | | |
Irganox L67 | | | | | | | | 0.5 | 0.5 | | | | | |
LAB TEST | KV100 cSt | | | | | | | | | 9.42 | 11.07 | 9.93 | 11.13 | 12.34 |
RESULTS | | | | | | | | | | | | | | |
| KV40 | | | | | | | | | 57.91 | 57.91 | 58.33 | 72.63 | 79.64 |
| PDSC Oxidation (min) | 75.29 | | 86.83 | 63.14 | 55.5 | | 51.73 | 51.34 | | | | | |
| Noack Volatility % | 5.26 | | 6 | 7.85 | 4.62 | | | | 4.6 | 6.34 | | 5 | 5 |
| Base Oil Blend Aniline Point | 110 | | 100 | 70 | 40 | 128 | | | 70 | 50 | 90 | 113.6 | 96 |
| TEOST 33 Rod Deposit (mg) | 14.1 | 19.3 | 11.7 | 6.8 | 3.4 | | | | 16.2 | 4.6 | 9.9 | 5.7 | 3.4 |
| Filter Deposit (mg) | 1.3 | 0.4 | 0.4 | 1.5 | 0.6 | | | | 1.3 | 1.9 | 4.4 | 1.5 | 0.9 |
| Total Deposit (mg) | 15.4 | 19.7 | 12.1 | 8.3 | 4 | 35.4 | | | 17.5 | 6.5 | 14.3 | 7.2 | 4.3 |
| | | | | | | | | | | | | | |
The formulation of the present invention is useful in preventing and/or removing carbon deposits on engine pistons, and maintaining and/or freeing up piston rings. Yet, at the same time, the formulation meets requisite elastomeric compatibility, oil consumption, cleanliness and corrosion requirements for the engine.