Can someone point me toward a good link of how to do an oil change for a 1990 348? I'm sure this has been covered several times, but the search function doesn't work on my phone for some reason.
Make sure you don't accidently try to remove the oil pressure plug thinking it's the drain plug...it's been done before. See thread below. Good luck with change, it's very easy. http://www.ferrarichat.com/forum/348-355-sponsored-bradan/480735-348-oil-plug-ok-replace.html
The oil drain plug is behind the metal stone guard at the front of the motor. It faces the front of the car, *not* the ground which is the other plug mentioned above. You'll also need a large Allen wrench, I bought a set of 1/2 drive large Allen sockets at harbor freight to do the job. They're also good for the tranny fluid plugs. Also the filter is often over tightened and difficult to get off. Ricambi sells the proper filter wrench as it isn't one of the common sizes. I got mine off with a rubber strap wrench with some difficulty.
Also I should add that the plugs have copper crush washers that should be replaced to do the job properly. Ricambi sells an oil change kit that includes these along with the filter. Last time I did my engine and tranny, I bought a few spares and replaced the plugs for good measure also.