Aufitt, you know the photo showing those bottles of GN4 will be all it takes to spark up an oil debate. I'll wager you one (1) genuine Honda crush washer*, that the next several pages of this thread will spin off into a full blown Rotella vs. Amsoil vs. Mobil1 vs. Castrol vs. Motul vs. ________ (fill in the blank). Of course we can't forget the 5W-30 vs. 10W-30 vs. 10W-40, and the full synthetic vs. ODDJ (Organic Dead Dino Juice) aspect to the debate.*Please don't let this become an oil debate, but here is my guide.
As straight forward and easy to understand as your Oil Change Guide is, there will always be those few who, just like when confronted with a wet dream, will figure out how to thoroughly screw it up... remember when we tried to advise DudeMan that using his cheap $10 Harbor Freight 1/2" drive torque wrench to tighten the oil filter cover bolts was a really bad idea, and he responded by serving up his famous turd sandwiches. Yup, seems like only yesterday... classic DudeMan modus operandi.
* Including postage... I figure postage from the U.S. to AU (or vise versa) shouldn't be more than 10 times what the crush washer is actually worth.