Agent,
Don't you think that if Aero had the 3rd party, unbiased testing done on the product, and proved it saved all the mileage that some claim, that all of the big 3 would be in line to authorize the product to be installed on all their vehicles, thus eliminating any fear that installation could void the warranty?
Would seem to make sense to me, and give them a competitive advantage that we already know is not shared by at least 2 other companies.
IMO/FWIW
"Taking advice from known stock promoters is like telling a pickpocket where you keep your money!!!"