According to the manual it has to be synthetic motor oil, which of course costs twice as much.

How to say “According to the manual it has to be synthetic motor oil, which of course costs twice as much.” in Japanese

In Japanese

説明書(せつめいしょ)だと化学合成(かがくごうせい)のエンジンオイルじゃなきゃダメなんだって。もちろん値段(ねだん)は倍(ばい)。

Setsumeisho da to kagaku gōsei no enjin'oiru ja nakya dame nan datte. Mochiron nedan wa bai.

According to the manual it has to be synthetic motor oil, which of course costs twice as much. in other languages