Don't want to rain on your parade but if you used Lucas after BG44K, chances are it's the latter that softened the buildup. Another factor is if the directions are not followed correctly. But if Lucas really works, that's well and good too. It's just that BG44K is part of TSB for Volvo and BMW's, and most dealers use it for FI cleaning. I use it on my BMW and most guys in our forum (roadfly) swears by it.
Funny thing is that it's hard to find one and guess where I get mine? At the Toyota dealership in our area, they're the only one who carries it.
PS: About that several hundred fuel injector cleaning, if you're willing to remove your injectors, there's a place in Michigan that does complete flow and test cleaning for $11 per injector. I think it was 'cruzinperformance' (how appropriate for LC's), if I recall correctly.
BG is marketed mostly to new car dealers and some independent shops. It's ORMD for the most part and requires special shipping procedures. If any one wants help locating a local source, PM me and I'll contact my rep. He can tell me who is the distributor in your area.
Within the hour after reading this post, I had a pair of Lucas bottles in my mitt. Just the other day I was wondering why the idle is a bit rough despite recent tuneup and throttle valve cleanup. So, I'll let you and the group know how it goes. My usual preference is Techron Concentrate, which I put through it a couple months ago.
Well Jody, it's another one for the books. That Lucas stuff smoothed out the idle in only a half tank. Impressive. Now I'm wondering what to do with the other bottle. The Subaru's idle is typical Boxer so I'm not sure I'll notice any smoothing. Hmmm.
Anyhow, I'll second the Lucas stuff. I used a smaller bottle - 6 oz or so on a full tank. Impressive.