SP oil is better than any of the preceding API ratings.

There are how to threads on here about changing the filters and fluid. Pretty sure there are two filters.

Here's one, I'm sure there are more: https://kizashiclub.com/forum/viewtopic.php?f=28&t=4657

Find me one for a Pontiac Firefly.

Mine seems weak too. I've been wondering if it needs more refrigerant.

If it's putting out a code of PO 420 this is best addressed by welding, an O2 bung back behind the second catalytic converter and lengthening the O2 sensor wires by 3 foot and moving that sensor back. This puts two aged Catalytic converter's to work where one used to do the job. Now that is clever ...

Looks great.

Welcome Bob, love your signature line.

Everything Kizashi ages well except the paint on the wheels, a couple of specific paint colors that are prone to chipping, and the CVT transmission.

We just went through this a week ago, there's no difference between FWD and AWD rear shock mounts.

https://kizashiclub.com/forum/viewtopic.php?f=12&t=5938

Fan should come on any time the A/C is on.

Probably transmission fluid, it's basically oil too. You should get an idea from which side it is, engine is on the right, transmission is on the left. Lay down a sheet of cardboard and check it the next morning so that there will be only one mark. If you use white paper you should be able to detect...

You probably need a new tensioner.

https://kizashiclub.com/forum/viewtopic.php?f=12&t=5303