NJ has mandated E10 since the mid-2000s. I have not had any issues with a occasionally driven (~2-3k/year) 93 Caprice with 80k miles and a 2000 Blazer with 123k miles, other than a drop in mpg (~5%).
The only E10 issues I’ve had are with an Echo weedwacker and a blower, the fuel lines became gummy and had to be replaced.
Ed B.