Unleaded 88/E15 Frequently Asked Questions

What is Unleaded 88/E15?

E15 is a blend of 15% ethanol and 85% gasoline.  It contains 5% more ethanol than E10, which is the most common fuel used in the U.S. E15 is higher in octane – typically 88 octane while E10 has an octane rating of 87. Retailers are offering E15 as Unleaded 88 to highlight its high octane value.

Is Unleaded 88 safe to use in my vehicle?

Unleaded 88 can be used in all 2001 & newer cars, trucks and SUVs. These model years represent more than 90% of vehicles on the road today. It’s the most tested fuel in history and has no effect on vehicle drivability. To date, more than 8 BILLION miles have been driven using Unleaded 88, and that number continues to grow.

What type of mileage will I get when using Unleaded 88?

There is no noticeable difference between the mileage achieved when using Unleaded 88 and the mileage when operating on E10.

What is the price of Unleaded 88?

Unleaded 88 is the lowest-cost fuel available for 2001 & newer vehicles, typically selling for 5 – 10 cents a gallon less than E10. The price difference between Unleaded 88 and conventional gasoline without ethanol is around 40 cents.

Why can’t I use Unleaded 88/E15 during summer months?

While it is essentially the same gasoline, the combination of federal regulations and obstruction by petroleum companies prevents the sale of E15 as a registered fuel in the summer (June 1 to Sept. 15).  When EPA approved E15 for use in all 2001 and newer passenger vehicles, it did not grant E15 the same vapor pressure waiver as E10.  Taking advantage of this, petroleum companies only send Iowa gasoline suitable for E10 blending and not E15 blending.  As a result, during the summer season, E15 is offered as an “alternative” fuel for flexible-fuel vehicles (FFVs) only (alternative fuels for FFVs have different regulations than registered fuels for ordinary vehicles.)  Efforts are under way to resolve the situation, but for now, E15 can only be sold to 2001 and newer vehicles from September 16 through May 31.

Can I use Unleaded 88/E15 in my lawnmower or other small engine equipment?

Unleaded 88 has not been approved by EPA for use in non-automotive engines like boats, motorcycles, lawn mowers and other small or off-road engines because it wasn’t tested. E10, however, is approved for every on-road and off-road engine.