OK - I'm done. Enjoy your little plastic gadget.:bravo:
I don't mean this as a personal attack, but I am just curious, why do you feel that the metal upgrade is necessary? it is virtually the same exact thing unless you plan to exceed the melting point temperature of plastic (at which point you've got bigger problems).
Also, it may or may not be stronger against hard hits because those cast aluminum caps would inherently be more brittle and possibly even more prone to impact damage vs the plastic counter part. Not to mention nothing should be hitting that area to begin with unless you like to roll without the skids on. I've seen plenty of cracked cast aluminum oil pans in my days to know that it's far from indestructible.
Plus you have a better chance of galling the threads in the filter housing since it would be aluminum vs aluminum threads (instead of aluminum vs plastic). The bad part about galling the threads on the housing side is...well it's obviously not as easy to replace as a cap that screws on and off. If I had a choice at which mating surface I would want to be consumable, I'd pick the plastic cap any day of the week.
I've used both types of Toyota oil canister caps in my various cars and I see absolutely no advantage in the metal counter part besides the false sense of security of it feeling "tougher", lol. Realistically speaking, nothing is going to damage that thing unless you purposely try to break it.
Instead of wasting your money upgrading to a metal cap, why not just upgrade to a higher quality better fitting filter wrench? I have a beefy metal filter wrench that fits snuggly and can take off even the most stuck caps without rounding off the hex shape on the end. It's the cheap 99 cents filter wrenches with very poor tolerances that cause all these issues. As with most things, you're only as good as your tools
