Saturn 2007 AURA Green Line Hybrid Owner's Manual page 257

Gasolines containing oxygenates, such as ethers
and ethanol, and reformulated gasolines may
be available in your area. We recommend that you
use these gasolines if they comply with the
specifications described earlier. However, E85
(85% ethanol) and other fuels containing
more than 10% ethanol must not be used in
vehicles that were not designed for those fuels.
Notice: Your vehicle was not designed for fuel
that contains methanol. Do not use fuel
containing methanol. It can corrode metal
parts in the fuel system and also damage
plastic and rubber parts. That damage would
not be covered under your warranty.
Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing
additive called methylcyclopentadienyl manganese
tricarbonyl (MMT); ask the attendant where you
buy gasoline whether the fuel contains MMT.
We recommend against the use of such gasolines.
Fuels containing MMT can reduce the life of
spark plugs and the performance of the emission
control system may be affected. The malfunction
indicator lamp may turn on. If this occurs, return to
your retailer for service.
257