I recommend you do more research and reading about the subject
You cannot run 100% E85 on your N20 at the moment
JB4 E85 Use
If equipped with the FlexFuel add on connector E85 mixtures may be used with pneumatic wastegate x28i models and the x20i electronic wastegate models. E85 is NOT supported for the electronic wastegate x28i model. When using E85 a mixture of no more than 40% is suggested.
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