Not long ago GasSaver posted his link to his company's fuel efficiency vehicle conversion, 95% of you blasted him off. Any way I took a shot on my Mercedes E320. I'm glad I did, I's getting 60 - 65mpg consistently, sometimes 81mpg, 45mpg in city. Mercedes are heavy cars. I couldn't believe I'm beating all hybrid vehicles. $1000 is nothing comparing to $17,000 you have to finance for a hybrid. If you bought a hybrid you made a big mistake, because your mpg will always be at 48/45mpg or below this. I will be posting photos if you care to see my mpg photos, if not it's not my problem.
You don't know science, your assumption was based on carmakers, they made mistakes on you and they had many recalls on your vehicles. If they did the right design in the first place, you wouldn't have to pay so much for Gas.
Any way you owe GasSaver an apology. I won't be posting their link because you are going to accuse me of working for them. For newcomers, to look for their services, all you have to do is to Google for "Optimum Fuel Systems", good luck.