Ive got a 1998 infinity i30, I have to add about half a quart of oil a week, but there never seems to be any leaks or puddles?

Question edited for clarity and toss in some CAPS.

There is nothing that backs up memory. When you disconnect the battery, all memory is lost, which is why it is important not to do it!

You don't tell us the model? Is it a secret? All questions need 'year make model' as the FIRST 3 words.

If your have a 1999 Infinity I30, the ECM Fuse is Fuse 58.

58 10 Engine Control Module (ECCS), Mass Air Flow Sensor, Crankshaft Position Sensor, Idle Air Control Valve (IACV-ACC) Solenoid Valve, Ignition Coils, EGR, EGR Volume Control Valve, EVAP Control System Pressure Sensor

Infiniti i30 (A32; 1995-1999) fuses and relays

Fuse Box Diagrams https://fuse-box.info > infiniti > infiniti-i30-a32-1995-...

Fuse box diagrams (location and assignment of electrical fuses and relays) Infiniti i30 (A32; 1995, 1996, 1997, 1998, 1999).

Infiniti i30, i35 (A33; 1998-2004) fuses and relays

Fuse Box Diagrams https://fuse-box.info > infiniti > infiniti-i30-i35-a33-1...

Fuse box diagrams (location and assignment of electrical fuses and relays) Infiniti i30 / i35 (A33; 1998, 1999, 2000, 2001, 2002, 2003, 2004).

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Question edited for maker.
Question moved to Nissan.

When I press post on this, I will officially become a Fixya Wizard, 44,424 Questions answered, 239,419 points gained and about 7 million people helped since 2006. Anyway, I digress, I just wanted to share :>D

Here is the diagram and very often there is a diagram on the fuse box lid.

Fuse Box Diagram Infiniti i30, i35 (A33; 1998-2004)

https://fuse-box.info > infiniti > infiniti-i30-i35-a33-19...
The fuse box is located behind the cover to the left of the steering wheel. The location of the fuses in the passenger compartment: Infiniti i30, i35 (1998.

hope this help. http://forums.edmunds.com/discussion/8138/infiniti/i30/infiniti-i30-electrical-issues

well it could be several things like pan plug seal cracked, oil pan leaking, rear main seal bad, front engine seal bad, head bolts not properly torqued, head could be cracked, but I would start with the oil pan drain plug seal and work from there.

As you have probably discovered, the diagram isn't included in the
Owner's Manual (http://www.downloadcarmanuals.com/1997-infiniti-i30-owners-manual-download) or even the service manual (Infiniti I30 and I35 Factory Service Manuals NICOclub).
It looks like the layout is the same as the Maxima from that era:



The 1998 layout is the same, although I'm not sure whether the actual lid/door will fit-
98 1998 Infiniti I30 Gray Fuse Block Cover Lid Door Panel Bezel OEM M88...

98 1998 Infiniti I30 Fuse Block Cover Lid Door Panel Bezel OEM 68964 eBay

Valve cover gaskets for that much oil i would say rear main seal.

It's not suprising that the engine stalled after getting hot considering you had run the engine out of oil as indicated by oil pressure light coming on and needing two quarts to refill it. Now that the oil is replaced, you could keep driving, but it would be wise to investigate why it had got so low on oil in the first place. Refer explanation below. You should check the oil level weekly to ensure it is at the correct level and top up if necessary. For that year vehicle, oil and filter changes should be around the 3,000 mile / 5,000 Km mark.
It sounds like the engine could be using excessive oil by either leaking out or being burnt in the cylinders.. If there is a major leak then there will be oil puddles under the engine after sitting for a while. Excessive oil burning in the cylinders is indicated by grey oil smoke from the exhaust when driving. If engine has oil and grime all over the best way to find the leaks is to get the engine pressure cleaned and then observe where the oil leaks are. The most usual places for older vehicles are the sump and valve cover gaskets followed by crankshaft seals. Oil leaks can also come from a loose oil filter or a faulty warning light pressure switch. If exhaust smoke is excessive then it would indicate worn piston rings and / or valve guides and seals.

same here on my rav4 1996,i just put in oil stop leak been ok for 8 months :) you will always get hatters of oil stop leaks,but they work ok,though i find don't like them have never used them

You must use 5w\40 or 10w\40 remember BMW recommends castrol for engine oil

Check the Seal around the Oil Pan Drain Plug. If this Seal is Missing or Warped it will slowly leak oil.