APC: Which one?

Spray Nine, never had an issue yet.

 

1Z Blitz for interior bits. Dilute 10:1. 'Nuff Said!

 

Optimum pc works very well and is a safe apc. I also like 1z blitz apc.

 

OPC is probably the most "all purpose" of them all, but really they all do their job for wheels, door jams, tough interior spots, and engines. I go through the most of Zep Citrus just because it is absurdly cheap when diluted and smells good. For tougher jobs that diluted Zep won't handle, I use Adam's APC straight. Megs APC+ is nice for interiors, I use it on very dirty leather with good results, but mostly just use ONR on interiors.

Anyway, you only need one. Since you can go to Home Depot and get a gallon of Zep Citrus for around $10, most people just do that, then use ONR or a detail spray on the interior.

 

I may be the only one, but I'm not a fan of Zep Citrus. It seems too oily for my taste.

Meguiars OPC is rough stuff. It dries everything out that I've used it on, recaros in my evo included.

I have both 1z and OPC and like both. I prefer opc and have yet to use the improved version.

Thanks to Phil, I have a gallon of the new OPC on the way,

 

Can I use OPC on mantained wheels?

 

Yes, but if by "maintained wheels" you mean ones that you wax or seal, OPC will strip the sealant / wax. You could try diluting it to some insanely low ratio, but at that point you may as well just use soap and water.