Part 2 of my most recent post, after some research.

HPR5 5w40 has 1050PPM of zinc... HPR5 is API rated at SN/CF (Which is the latest rating of API)
RACING5 5w30 has 1320PPM of zinc... RACING5 is API rated as SL/CF (Which is an older rating of API)
RACING10 10w40 has 1240PPM of zinc... RACING10 is API rated the same as HPR5 (which is the recommended oil on Penrite's website)

Would it be worth running (And can the motor actually handle on a long-term basis) the RACING10 to get the Zinc benefits, but also keep the API rating to the latest? (From research, the RACING5 exceeds the SL rating, but cannot find anywhere that proves it meets or exceeds the minimum for the later SN rating which the Accord motor may or may not require - cant find what the accord 3.5L needs). I have a feeling that the 10w40 may be too thick but, cant work out how important the rating is.