FIELD TRIALS|ROAD TRANSPORT|BUS · DIESEL · TURBOCHARGED
FIELD TRIAL REPORT OF 10.04.2009
OTOYOL bus: diesel, pump and turbo grew quieter with no teardown, in service
PRODUCTXADO 15W40 DIESEL motor oilrevitalizant gel for diesel engines · VITAFLUSH cleaner before the oil change
TEST OBJECTOTOYOL bus, 493 887 km on the odometerdiesel engine · injection pump with injectors · turbocharger
DOCUMENT TYPEField trial report
of FIDAN LLCsigned by a commission of six members
of FIDAN LLCsigned by a commission of six members
Key results
↓40-52%
vibration of the crankshaft main journals, 80-100 → 45-48 dB
↓44-45%
vibration of the injection pump injectors, 18-22 → 10-12 dB
↓11%
vibration of the turbocharger, 54 → 48 dB
| EQUIPMENT | MILEAGE AT START | WHAT WAS MEASURED |
|---|---|---|
| OTOYOL bus, turbocharged diesel | 493 887 km | Vibration level at the crankshaft main journals, injection pump injectors and turbocharger |
Engine — vibration at the crankshaft main journals
| MEASURING POINT | BEFORE OIL CHANGE | AFTER 17 500 KM | CHANGE |
|---|---|---|---|
| Main journal R1 | 80 dB | 45 dB | −35 dB |
| Main journal R2 | 80 dB | 45 dB | −35 dB |
| Main journal R3 | 100 dB | 48 dB | −52 dB |
| Main journal R4 | 80 dB | 48 dB | −32 dB |
| Main journal R5 | 50 dB | 42 dB | −8 dB |
Measurement in decibels at each main journal — before the oil change and again after 17 500 km of running.
Injection pump and turbocharger — vibration
| MEASURING POINT | BEFORE OIL CHANGE | AFTER 17 500 KM | CHANGE |
|---|---|---|---|
| Injection pump injector I | 22 dB | 20 dB | −2 dB |
| Injection pump injector II | 18 dB | 10 dB | −8 dB |
| Injection pump injector III | 22 dB | 12 dB | −10 dB |
| Injection pump injector IV | 20 dB | 18 dB | −2 dB |
| Turbocharger | 54 dB | 48 dB | −6 dB |
The injection pump injectors and the turbocharger were measured by the same method and on the same dates as the main journals.
Findings of the commission
The bus had run 493 887 km; before treatment the vibration level at the crankshaft main journals reached 100 dB. The engine was not disassembled — after flushing it was filled with XADO 15W40 DIESEL oil, the revitalizant gel was applied as instructed, and the vehicle stayed in service on its route. Over 17 500 km with no change of oil or oil filter the vibration fell at all ten measuring points: at the main journals, the injection pump injectors and the turbocharger. The commission of FIDAN LLC recorded in the findings of the report: XADO 15W40 DIESEL motor oil in the engine of an OTOYOL bus with such mileage can be operated for up to 25 000 km without changing the oil filter — the residual oil life at the time of measurement was 30 %; owing to the revitalization process, individual thermal clearances between the main journals and the engine bearing shells were restored by 50 %, the injection pump injectors to the specified 0.09-0.10 mm by 45 %, and the turbocharger by 12 %.
The results relate to an OTOYOL diesel bus with 493 887 km of mileage and to its scheduled route operation; on other equipment and under other conditions the figures may differ. The trials were organized by the XADO group together with FIDAN LLC. The original report is published in full and available for download.
Current equivalent
- Revitalizant gel for compressors and bearingsCompressors · bearings · spindles
- Revitalizant gel for diesel enginesDiesel engines
How such units are treated: