I forgot to mention BG44K. BG Products is based in my hometown and are by far the most excellent products.

I believe my Toyota dealership used to carry it.

What available products do they have in your area?

I wish I had an IS-F
This is just from experience. I moved from Kansas to California when I joined the Air Force. The quality (or its lack of quality) has taken a toll on my HIlux's performance. Just about once a month I'll toss in a can of B12 to clean out the system.


I think BG products are a bit harder to source in CA. (I do use Purolator PureONE filters, those I have to buy in bulk from amazon.)