My favorite part:
IMPORTANT: We are going to reveal to you fuel saving techniques unknown to the average mechanic - so don't go around asking "experts" who think they know everything! Instead, order these books, test the technology and then contact us with any questions you may still have. You're lucky to have found this place because what you get here are unique and little-known energy saving FACTS - discovered by experimenting, not by theory.
These facts are not obvious. In every street corner you'll find an expert or two who may have listened to their schoolteacher but have never TOUCHED this technology. The only way to know:
(1) Don't listen to anybody!
(2) Read these books to discover how we are getting ACTUAL RESULTS right now,
(3) Test it yourself!
Gee, why wouldn't they want me to ask anyone?