Chevrolet TRACKER 1993 Owner's Manual download pdf (Page 225)

I

NOTICE

r

Fuel

Use regular unleaded gasoline rated at

87

octane or higher.

It

should meet

specifications, ASTM

D4814

in the

U.S.

and CGSB 3.5-M92 in Canada. These

fuels should have the proper additives,

so

you should not have to add anything

to the fuel.

In

the

U.S.

and Canada, it’s easy to be

sure you get the right kind of gasoline

(unleaded). You’ll see

UNLEADED

right on the pump. And

only

unleaded

nozzles will fit into your vehicle’s filler

neck.

Be sure the posted octane is at least

87.

If

the octane is less than

87,

you may

get a heavy knocking noise when you

drive. If it’s bad enough, it can damage

your engine.

If you’re using fuel rated at

87

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 or alcohol?

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