Ford Taurus, Руководство пользователя

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engine pings, knocks, or diesels (runs with the ignition off) switch to a
higher grade of fuel. Sometimes just changing brands will cure the
problem. If it becomes necessary to retard the timing from the
specifications, don't change it more than a few degrees.
Retarded timing will reduce power output and fuel mileage, in addition to making
the engine run hotter.
OIL RECOMMENDATIONS
The SAE (Society of Automotive Engineers) grade number indicates the viscosity
of the engine oil and, thus, its ability to lubricate at a given temperature. The
lower the SAE grade number, the lighter the oil; the lower the viscosity, the
easier it is to crank the engine in cold weather. Oil viscosities should be chosen
from those oils recommended for the lowest anticipated temperatures during the
oil change interval. With the proper viscosity you will be assured of easy cold
starting and sufficient engine protection.
Multi-viscosity oils (5W-30, 10W-30, etc.) offer the important advantage of being
adaptable to temperature extremes. They allow easy starting at low
temperatures, yet they give good protection at high speeds and engine
temperatures. This is a decided advantage in changeable climates or in long
distance driving.
The API (American Petroleum Institute) designation indicates the classification of
engine oil used under certain given operating conditions. Only oils designated for
use Service SG, or the latest superceding oil grade, should be used. Oils of the SG
type perform a variety of functions inside the engine in addition to their basic
function as a lubricant. Through a balanced system of metallic detergents and
polymeric dispersants, the oil prevents the formation of high and low temperature
deposits and also keeps sludge and dirt particles in suspension. Acids, particularly
sulfuric acid, as well as other byproducts of combustion, are neutralized. Both the
SAE grade number and the API designation can be found of the side of the oil
bottle. Oil meeting API classification SG, SG/CC or SG/CD is recommended for
use in your vehicle. Ford has filled your crankcase with SAE 5W-30 and
recommends that you continue to use this as long as the outside temperatures
don't exceed 100°F (38°C). There are other options, however, such as SAE 10W-
30; refer to the accompanying oil viscosity/ambient temperature chart.
Click to enlarge
Engine oil viscosity recommendations
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18.11.2005 http://www.chiltondiy.com/content/8687/8687_1_7.html