I believe too much ethanol in your OEM fuel system will eat all the rubber hoses and seals. So I think its a bad Idea. In Illinois if you spend $450 on repairs they will give you a conditional pass on the smog test.

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1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T