Les,
This is off-topic, but do you know where BPair brand aviation gasoline is made? The Jet A sold here at Long Beach is probably made at the BP Carson refinery, just down the road but 100 octane low lead is a low-volume specialty product. Chevron and Exxon 100LL come from Texas, not local refineries like Jet A.
On-topic comment on Techron, it does seem to remove upper cyliner deposits. My '88 Ford Ranger V-6 used to ping on 87 octane until a Techron treatment. This needed to be repeated about every 20,000 miles.