What long term tests and real world experiences does the manufacturing/distributing companies have to prove their claims?
I would be skeptical about this but very hesitant to put it in my car. I use the best fuel for my car and I accept whatever fuel economy I get.
If you do go ahaed and use this formula, please let us know how things go.
If you don't I can certainly understand that.
All the best
328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect. JB4 on Map 2 with Catless DP produces awesome performance in Sport.