Anyone know what the deal is between 053103663 and 028103663B?
Other than 6mm or so longer in favor of the latter?
My AAz came out of the crate with the former, but my application listings seem to
call the AAZ the 663B version, which is longer, which would mean I've been running the oil
a bit low. Or the data is incorrect, and I'd be running it overfull with the 663B...
So... yeah.