$30 per single 4 oz bottle
4 oz treats 3 to 5 qts synthetic oil
As I recall -
After a race's worth of running, on over 100 AMA and WERA bikes, we gained from 2% to 3% power,
The least gain I saw was 1% (JR's super loose race engine) and the most I ever saw was 4% (on a super tight, built for street, engine).
The other 98 bikes picked up 2% to 3% power increase - with most 2% and 2.5%.
Lasts 2 and up to 3 oil changes (tapering off in effect).