What Honcho said! 5.3qt (or, 5 liters) is correct. I filled the filter, and then did 5qt in the engine and dipstick was at right at the top fill mark.Most people fill 5 in the engine and then check the dipstick to top off. Others will fill the filter before install to get the 0.3.
There isn't mention of the 4.5 anywhere in the service manual so I'm not sure where that number comes from. I've also dug around online and can only find it where people are asking where the 4.5 number comes from.I've got a '91 and I've downloaded a PDF of the '91 FSM. Why does the manual say an oil and filter change requires 5.3 US qts. and on the air box there's a label that says 4.5? Which is correct?
The airbox is bespoke to the NSX. It may be as simple as a misprint on a run of stickers. Or Honda/Acura used the sticker for another car on the NSX airbox cover by accident (whether at the factory or during service)@Superhatch oh yeah, I shoulda read my original post LOL. Why does my airbox say that? I do know the PO had a K&N filter on it and prior to the sale put the stock airbox back on it. It fits the NSX paper filter perfectly, so I assume it's a OE NSX airbox, but maybe not? I don't know if there are other airboxes that are interchangeable? That's the only thing I can think of. And I have it up on a lift with a car beneath, so I cannot easily double-check, but doubt I misread it....
It's such a weird thing considering how specific and intentionally designed the entire car was.It's funny that it still says 4.5L in 2002.
The old, long filters probably do. The new "shorties," probably not!@Honcho not so fast LOL: does the filter and its plumbing hold .8 qts of oil?! This still doesn't add up in my book....