OK, I don't want to give any conclution yet. So, let's go on to the test comparison. Mobil Delvac 1 is Singapore packaging nor the US. Pertamina Fastron is Indonesian product.
| Mobil Delvac 1 | Pertamina Fastron | |
| Kinematic Viscosity @ 100°C, cSt (ASTM D-445) | 14.7 | 14.13 |
| Kinematic Viscosity @ 40°C, cSt (ASTM D-445) | 98 | 99.99 |
| Viscosity Index (ASTM D-2270) | 156 | 144 |
| Flash Point °C (ASTM D-92) | 249 | 230 |
| Pour Point °C (ASTM D-97) | -48 | -27 |
| Total Base Number, mg KOH/g (ASTM D-2896) | 10.1 | 6.43 |
Based on the technical data, lets try compare the oil one by one.
- Kinematic Viscosity @ 100°C, cSt (ASTM D-445) Delvac 1 value is 14.7 and Fastron is 14.13, that mean at 100°C Delvac 1 is thicker than Fastron.
- Kinematic Viscosity @ 40°C, cSt (ASTM D-445) Delvac 1 value is 98 and Fastron is 99.99, that mean at 40°C Fastron is thicker than Delvac 1.
- Viscosity Index (ASTM D-2270) Delvac 1 values is 156 and fastron is 144, that mean Delvac 1 more strengthen than Fastron to maintain it's viscosity over a wide temperature range.
- Flash Point °C (ASTM D-92) Delvac 1 value is 249 and Fastron is 230, that mean Delvac 1 is starting to vaporizes to create enough gas that become momentary flammable is higher than Fastron.
- Pour Point °C (ASTM D-97) Delvac 1 value is -48 and Fastron is -27, that mean Delvac 1 is still can flow lower than Fastron.
- Total Base Number, mg KOH/g (ASTM D-2896) Delvac 1 value is 10.1 and Fastron is 6.43, that mean Delvac 1 has the ability to neutralize acid far more better than Fastron.
Time to test these two. The method that I use is:
- Drain the oil from my scooter until the last drop
- Check whether there is still some oil in the crankshaft or not
- Fill the brand new oil into the engine about 850mL
- Change the air filter with the new one
- Start the engine and make sure the engine is hot enough and the idle RPM is flat
- Test the oil on regular road condition until 2000km usage at maximum speed 70kmh
Mobil Delvac 1:
- Torque This is make my scooter torque heavier. I had to prepare more time to accelerate before passing a bus.
- Engine noise Quiet enough, don't know for sure how much dB is it. 'Cause I don't test it with a proper tool.
- Torque after 2000km Fell is just as same as the first time I fill the oil into the engine.
- Engine noise after 2000km Much the same as the first one.
- Oil color after 2000km Very deep dark brown color
Pertamina Fastron:
- Torque Better than Delvac 1
- Engine noise Similar to Delvac 1
- Torque after 2000km The torque after 2000km is increased, I think that because the oil is starting to degrade to become 30W.
- Engine noise after 2000km A little noisy on the cylinder head, I can hear the rocker arm sound pressing the valve stem.
- Oil color after 2000km Deep dark brown color
My country is tropical country that the temperature range about 28-32°C at noon.
My conclution is:
- Fastron was better on the torque. That make sense, because the cSt of Delvac 1 @ 100°C is thicker than Fastron.
- Delvac 1 can be use longer than Fastron, indicated by the sound of the valve stem. This is make sense too, because Delvac 1 has higher VI and TBN than Fastron.
Source:
- Mobil Delvac 1 5W-40
- Pertamina Fastron 10W-40
nice topic. i just want ask about how do you get the properties of those oil.? internet or anywhere else.?
ReplyDeleteHello Alfin,
ReplyDeleteI already mention it from where I get those data sheet. Try scroll down to the bottom of my article and you will find the answer.
Maybe I'll give a little correction, that data which you present was Mobil Delvac 1 ESP 5W40, not Delvac 1 5W40.
ReplyDeleteAPI Specification of both also differ where Delvac 1 ESP is CJ-4 while Delvac 1 still CI-4. Both for the diesel engine of although can be used for the gasoline engine but just for temporally used.
Fastron used for the gasoline engine of and can be used for the diesel engine of with API specification CF. So, for diesel engine Fastron performance is inferior than Delvac 1/ESP
As far as I know, high TBN more need for diesel engine, because diesel fuel containing many sulphur while gasoline more clean.
According to manual from CIMAC, TBN too high also can generate deposit at valve stem.
Thx for the correction.
ReplyDelete