Damage can be caused to your engine if you are using ethanol in a ratio higher than your vehicle manufacturer suggests or if you have not modified your vehicle accordingly. Additionally, it is important that you check and maintain your vehicle to prevent damage.

Yes, older pipes can leak due to degradation and may not compensate for the fuel air ratio due to the higher oxygen content within the ethanol. Most newer cars have been manufactured to deal with this.

Yes, ethanol attracts water, and this can cause engine issues, so the ethanol must not be left to stand in the vehicle for a long period of time.