KIA Rio_Rio5 2005 - Manual (Page 220)

Maintenance
7-48
Engine oil viscosity (thickness) has an effect on fuel
economy and cold weather operation (starting and oil
flow). Lower viscosity engine oils can provide better
fuel economy and cold weather performance, however,
higher viscosity engine oils are required for
satisfactory lubrication in hot weather. Using oils of
any viscosity other than those recommended could
result in engine damage.
When choosing an oil, consider the range of
temperature your vehicle will be operated in before the
next oil change. Then select the recommended oil
viscosity from the chart.
✻ ✻
NOTICE
Always be sure to clean the area around any filler
plug, drain plug, or dipstick before checking or
draining any lubricant. This is especially
important in dusty or sandy areas and when the
vehicle is used on unpaved roads. Cleaning the
plug and dipstick areas will prevent dirt and grit
from entering the engine and other mechanisms
that could be damaged.
Recommended SAE Viscosity Number
Temperature Range for SAE Viscosity Numbers
Temperature
Gasoline
Engine Oil
°C
(°F)
-30 -20 -10 0 10 20 30 40 50
-10 0 20 40 60 80 100 120
10W-30
5W-20, 5W-30
RIO ENG CNA 7-2.qxd 7/29/05 5:18 PM Page 48