Pentosin FFL-4 GL5 is not Honda spec.
You must use 75w or 75w80 GL4.
Examples: Redline MT-LV 70w (strong additive), GM 1940004 93165694 75w, Castrol BOT 303 75w, Castrol Syntrans B 75w (different chemical to Honda and Castrol BOT 303 but compatible), Ford 75w FE M2C200-D2, Volvo 31280771...