jonule wrote:0W20 oil is advertising, it must cost candy!
before everyone was putting 15w40 and everyone had to switch to 10w40 (TD), but everyone can ride with the 20w50 (TD)!
I can hardly see a motor breaking with 20w50 ... what I mean is not "put anything in your engine" but: why are they selling petroleum oil more and more expensive?
and especially why nobody talks about VEGETAL lubricating oil?
whose properties are equal to the minerals ?? and moreover biodegradable?
The more fluid the oil is and the finer the film of oil, the lower the friction: a modern motor is designed to work with fluid oil, in general 5w40 see 0w30, put 20w50 would raise the consumption in fairly substantial proportions: no interest ... (note that I am in the manufacture of engine parts) ...
The only vegetable oil that can be used, and has also been widely used in engine lubrication, is castor oil, a question of creaminess and resistance to high t °, a super synth is not better, but ... there is a but: it oxidizes very quickly and very quickly forms sludge in the engine, which motivated its abandonment around the Second World War, but was still used for a long time in competition.However a small Belgian manufacturer always makes vegetable-based oils, especially with castor oil, but according to a process of chemical recomposition of their invention that removes all the drawbacks: apparently they are quite in the game and have obtained approval Porsche, Mercedes Benz and VW which is not nothing:
http://www.electrion.be/
unfortunately it is only sold in Belgium ...