sbaert wrote:
Here we go again, another oil thread.
What is high revvin for a car (7K), is barely above idle for a motorcycle that can rev up to 17K.
Many people believe oil is oil. Maybe 50 years ago. Not so today.
Try running a standard oil in a diesel engine that has a particulate filter. It will clog up that DPF and leave your wallet more than empty.
I only use the Eni/Agip as specified by Piaggio and nothing else AND I change the oil + filter every 5K km (3K miles) or every year whichever comes first.
The factory specified oil is inexpensive and only a Amazon click away. Try pricing a new replacement engine.
https://www.amazon.co.uk/ENI-i-Ride-PG-5W-40-litre/dp/B006NJKO6M
Oil can be changed? Damn I'd best look into this, it could explain that knocking sound.
I ran a Royal Enfield for 17 years. When it was new I thought I would switch it over to the then brand new Mobil One synthetic oil. Following Mobil recommendation I carefully broke the motor in using the factory recommended 20w50 mineral base and then switched over to the synthetic. It ran fine, nice and quiet and notably cooler, a good trick with that old type hot as hell iron cylinder.
Too cool its turned out, I could ride it to work 27km away on a 75 degree day and the cases were still just barely warm when I rolled into my parking spot. After a week the engine was showing signs of condensation build up so I pulled the full synthetic and went over to a blend so I could get enough heat into the engine. We often forget that the engine's oil is its primary cooling medium, not the fins on the barrel or the rad hanging in front of it. I sold that bike with 76000 on the original bore, piston and rings and it still wasn't using any oil. I wouldn't doubt for a second that the quality of the lubricants had a lot to do with that.
As for specifying JASO, it is a Japanese standard, their equivalent to SAE. When you think of who developed the majority of what we accept as the modern motorcycle it seems logical that the oils for those engines would be developed there as well. Piaggio recognizes that the oils they need have already been defined by the Japanese so they are just using those definitions to call out the lubricants they need, why reinvent the wheel.
SAE is an American system and, lets face it, the US is not exactly the home of high revving engines, so they may be a bit behind in this area.