DeVille DHS V8-4.6L VIN Y (2000)
Fuel: Description and Operation
Use premium unleaded gasoline rated at 91 octane or higher for best performance. You may use middle grade or regular unleaded gasolines, but your
vehicle may not accelerate as well.
It is recommended that the gasoline meet specification which have been developed by the American Automobile Manufactures Association (AAMA) and
endorsed by the Canadian Motor Vehicle Manufacturers Association for better vehicle performance and engine protection. Gasolines
meeting the AAMA specification could provide improved driveability and emission control system performance compared to other gasolines. For more
information, write to: American Automobile Manufacturer's Association, 7430 Second Ave, Suite 300, Detroit MI 48202.
Be sure the posted octane for premium is at least 91 (at least 89 for middle grade and 87 for regular). 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 the recommended octane or higher and you 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.
NOTE: Your vehicle was not designed for fuel that contains methanol. Do not use methanol fuel which can corrode metal parts in your fuel system and
also damage plastic and rubber parts. This kind of damage would not be covered under your warranty.
If your vehicle is certified to meet California Emission Standards (indicated on the under hood emission control label), it is designed to operate on fuels
that meet California specifications. If such fuels are not available in states adopting California emissions standards, your vehicle will operate
satisfactorily on fuels meeting federal specifications, but emission control system performance may be affected. The malfunction indicator lamp on your
instrument panel may turn on and/or your vehicle may fail a smog-check test. If this occurs, return to your authorized dealer for diagnosis to determine
the cause of failure. In the event it is determined that the cause of the condition is the type of fuels used repairs may not be covered by your warranty.
Some gasolines that are not reformulated for low emissions may contain an octane-enhancing additive called Methylcyclopentadienyl Manganese
Tricarbonyl (MMT); ask your service station operator whether or not the fuel contains MMT.
