燃料添加剤を入れ続けたらエンジンの中は綺麗になるのか？オイル汚れもチェックする！【AZ FCR-062】

I've been using fuel additives for 7,500km, so I took a look inside the engine! The engine has definitely become cleaner, but the oil has become dirtier. I'll continue to use fuel additives and check it. AZ Fuel Additive 1L FCR-062 Gasoline Additive Diesel Additive https://amzn.to/42d7PJf I use a Teslong Fiberscope 1080P Dual Lens Endoscope Camera to see inside the engine, but it seems to be out of production now. There must be a better one out there now! Main Channel [Takaaki.Takaaki]    / tstyle69   Twitter   / tstyle69   Instagram   / t_style69   Blog https://t-style.xyz ♫ DOVA-SYNDROME https://dova-s.jp