Chevrolet 1993 Astro Bedienungshandbuch PDF herunterladen (Seite 241)

you’re using fuel rated at

octane or higher and you still hear heavy

knocking, your engine needs service. But don’t worry if you hear a little

pinging noise when you’re accelerating or driving up a hill. That’s normal, and

you don’t have to buy a higher octane fuel to get rid of pinging. It’s the

heavy, constant knock that means you have a problem.

What about gasoline with blending materials that contain oxygen, such as

MTBE

alcohol?

MTBE

is “methyl tertiary-butyl ether.” Fuel that is no more than

15%

MTBE is

fine for your vehicle.

Ethanol

is ethyl or grain alcohol. Properly-blended fuel that is no more than

10%

ethanol

is fine for your vehicle.

Methanol

is methyl or wood alcohol.

Fuel that is more than

methanol

is bad for your vehicle. Don’t use

It.

It can corrode metal parts in your fuel system and also damage plastic

and rubber parts. That damage wouldn’t be covered under your warran

And

even at

less, there must be “cosolvents”

cc----6io

preventers in this fuel to help avoid these problems

Gasolines for CIeaner Air

Your use of gasoline with detergent additives will help prevent deposits from

forming in your engine and fuel system. That helps keep your engine in tune

and your emission control system working properly. It’s good for your vehicle,

and you’ll be doing your part for cleaner air.

Many gasolines are now blended with materials called oxygenates. General

Motors recommends that you use gasolines with these blending materials,

such as MTBE and ethanol. By doing

so,

you can help clean the air,

especially in those parts of the country that have high carbon monoxide

levels.

In addition, some gasoline suppliers are now producing reformulated

gasolines. These gasolines are specially designed to reduce vehicle

emissions. General Motors recommends that you use reformulated gasoline.

By doing

so,

you can help clean the air, especially in those parts

the

country that have high ozone levels.

You should ask your service station operators

their gasolines contain

detergents and oxygenates, and

they have been reformulated

reduce

vehicle emissions.

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