CASE SERIES|STEELMAKING · ROAD TRANSPORT|PETROL ENGINES · COMPRESSION
NINE FLEET TEST REPORTS · OCTOBER 2008 — FEBRUARY 2009
series of 9 acts
Fleet petrol engines: compression rose and evened out, no teardown
PRODUCTXADO revitalizants
for petrol enginesfull oil-system treatment cycle · VitaFlush cleaner before the oil change
for petrol enginesfull oil-system treatment cycle · VitaFlush cleaner before the oil change
TEST OBJECTEngines of nine fleet vehiclesVAZ-21099 (two vehicles) · GAZ 3110 · GAZ 22171 · UAZ 31514 · Nissan Patrol · OPEL OMEGA · SKODA OCTAVIA · VOLVO S80
DOCUMENT TYPENine technical reports
of OJSC ArcelorMittal Kryvyi Rih
of OJSC ArcelorMittal Kryvyi Rih
What repeated on all nine vehicles
compression evened out across the cylinders
↑5.6-14.6%
cylinder compression, 7.7-12.4 → 8.5-13.0 kgf/cm²
| VEHICLE, PLATE NUMBER | MOTOR POOL | ODOMETER AT START, KM | DISTANCE OVER CYCLE, KM |
|---|---|---|---|
| GAZ 22171, AE 3678 AA | No. 14 | 273 639 | 36 556 |
| GAZ 3110, AE 3742 AT | No. 10 | 533 911 | 11 236 |
| Nissan Patrol, AE 2962 AT | No. 10 | 556 450 | 21 612 |
| OPEL OMEGA, AE 2829 AT | No. 10 | 404 290 | 16 993 |
| SKODA OCTAVIA, AE 8851 AV | No. 10 | 382 135 | 18 076 |
| UAZ 31514, AE 3478 AT | No. 12 | 57 835 | 11 747 |
| VAZ-21099, AE 2825 AT | No. 10 | 398 122 | 22 418 |
| VAZ-21099, AE 2807 AT | No. 10 | 246 456 | 13 535 |
| VOLVO S80, AE 3146 AT | No. 10 | 496 281 | 13 340 |
Compression across the fleet: before treatment, gain, evening out
| VEHICLE, PLATE NUMBER | COMPRESSION BEFORE, KGF/CM² | GAIN BY CYLINDER, KGF/CM² | SPREAD BEFORE → AFTER, KGF/CM² |
|---|---|---|---|
| GAZ 22171, AE 3678 AA | 10.7-12.4 | 0.1-2.1 | 1.7 → 0.8 |
| GAZ 3110, AE 3742 AT | 8.1-10.3 | 0.2-1.8 | 2.2 → 0.6 |
| Nissan Patrol, AE 2962 AT | 9.2-11.0 | 1.0-1.6 | 1.8 → 0.6 |
| OPEL OMEGA, AE 2829 AT | 10.0-11.9 | 0.3-2.1 | 1.9 → 0.3 |
| SKODA OCTAVIA, AE 8851 AV | 9.8-12.1 | 0.1-2.0 | 2.3 → 0.4 |
| UAZ 31514, AE 3478 AT | 7.7-8.2 | 0.4-0.8 | 0.5 → 0.2 |
| VAZ-21099, AE 2825 AT | 10.1-11.5 | 0.4-1.8 | 1.4 → 0.4 |
| VAZ-21099, AE 2807 AT | 10.8-12.0 | 0.2-0.9 | 1.2 → 0.6 |
| VOLVO S80, AE 3146 AT | 7.7-9.5 | 0.7-2.5 | 1.8 → 0.4 |
Measured with a ZEGA 362 compression tester before and after the cycle. Averaged per engine, compression rose by 5.6-14.6 %, and the cylinder-to-cylinder spread narrowed on all nine vehicles.
Conclusions of the plant commissions
All nine reports of OJSC ArcelorMittal Kryvyi Rih recorded one and the same thing: "the maximum compression pressure evened out and increased across the cylinders". The largest gains came from the most worn cylinders — 2.5 kgf/cm² on the VOLVO S80 and 2.1 kgf/cm² on the OPEL OMEGA and the GAZ 22171 — while the sound ones barely moved: the coating builds up where there is wear and stops at the factory nominal. Hence the commissions' conclusion: "The increase in compression across the cylinders indicates the formation of minimal thermal clearances in the cylinder-piston group through the build-up of a layer of XADO metal ceramics on the working surfaces of the parts, which contributes to higher engine power, optimises the fuel combustion process and ultimately leads to lower fuel consumption during engine operation". The engines were not opened up, and the vehicles kept running the plant's ordinary routes.
The results apply to the petrol engines of passenger and combi vehicles in the fleet of OJSC ArcelorMittal Kryvyi Rih with odometer readings from 58 thousand to 556 thousand km; on other equipment and under other operating conditions the figures may differ. The originals of all nine signed reports are published in full and available for download.
Current equivalent
- Revitalizant gel for cylinder restorationEngine cylinders, deep wear
- Revitalizant gel for petrol enginesPetrol engines
How such units are treated: