The main thing to make sure of is that you use a motorcycle oil, not a car engine oil. The two are different even if they meet the same specification. The bikes that I see in the workshop with higher oil consumption are generally bikes that have been run on car engine oil for most of their lives. Car oil causes greater piston, ring, camshaft, and cylinder wear over time for several reasons that I won't go into (again) here.
Putting a slightly higher grade fully synthetic motorcycle oil such as a 10-50 is ok if your bike is using more oil than it should. IT will reduce consumption by some. But bear in mind this also causes greater cylinder and piston ring wear when the engine is cold or on shorter trips. The flow rate is lower so you get extra engine wear, albeit in your case only a small amount.
Nearly all engine wear experienced by your engine (between 93-97% depending on the type of engine) over it's entire life occurs during it's first 7 minutes of cold operation after start up. Almost no wear occurs during 'hot running', unless you use a car oil which is not designed to protect an engine running at the sort of temperatures and engine revs our bikes work at.
Let us know how your oil consumption is after switching oil viscocity. Good luck.
the oil I used is for motorcycles, since I changed the oil I have traveled 300 km and consumed nothing. unfortunately in the scooters the oil is heavily stressed and the rpm are high. plus the operating temperatures are high and the oil degrades immediately. with this oil as you pointed out, I don't do many engine revolutions until the temperature is in optimal conditions.
Excellent Enrico. You have a good understanding of oil. I cover around 7,000 miles per year on my GTS300. I change my oil and filter at the recommended 6,200 miles. I use the recommended 5-40 fully synthetic motorcycle oil. My engine uses almost no oil, it does not require topping up between changes. During the first 3,000 miles it used around 50 mil of oil and then stopped using any real noticeable amount. Very pleased with it.
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