Gmc 2007 Acadia User Manual download pdf (Page 389)

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101

Additives

To provide cleaner air, all gasolines in the

United States are now required to contain additives

that help prevent engine and fuel system

deposits from forming, allowing the emission

control system to work properly. In most cases,

you should not have to add anything to the

fuel. However, some gasolines contain only the

minimum amount of additive required to meet

U.S. Environmental Protection Agency regulations.

To help keep fuel injectors and intake valves

clean, or if your vehicle experiences problems due

to dirty injectors or valves, look for gasoline that

is advertised as TOP TIER Detergent Gasoline.

Also, your dealer/retailer has additives that

will help correct and prevent most deposit-related

problems.

Gasolines containing oxygenates, such as ethers

and ethanol, and reformulated gasolines might

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 can 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 could be affected. The malfunction

indicator lamp might turn on. If this occurs,

return to your dealer/retailer for service.

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