Hello, if anyone can explain by experience, is it 5W oil really makes engine vibrates more than 10W? I tried several fully synthetic lubricants (0W and 5W respectively) and both makes my 115cc moped vibrates like jackhammer
The complaint you mention (vibrating like a jackhammer) is not due to any lube.
May be a significant mechanical problem, or an exaggeration of some proportion.
If this is just a trolling thread, it's not gonna end well.