Unleaded 88 gasoline is E15 fuel, containing up to 15% ethanol. While some newer vehicles may be rated to handle this, many older vehicles are only rated for E10 (10% ethanol). Some users …

Sep 19, 2021 · E88 fuel is a blend of 85% gasoline and 15% ethanol, resulting in an octane rating of 87 or higher. While it won't harm your Wrangler, it may reduce fuel economy by 2-3% …