A 2006 Dodge Stratus 2.7L call for 5 quarts of 5W-30 semi-synthetic oil. For maximum performance, 100% synthetic 0W-30 can also be used. Consumer reviews state the pros of the 2006 Dodge Stratus is the steering and handling. They list the cons as the acceleration, or lack thereof.
A number before the 'W' (weather) is the 'cold' viscosity rating of the oil. The number after the 'W' is the 'hot' viscosity rate. So a 5W40 oil is one that acts like a 5 rated single grade oil when cold, but does not thin any more than a 40 rated single grade oil when hot. The lower the 'winter' (W) number the easier the engine turns over when starting in colder climates.
Engine oils are graded according to their viscosity – basically how thick or thin they are. Viscosity changes with temperature. The vehicle handbook includes information about the specification(s) of engine oil that are suitable for your engine.
If you're having difficulty finding oil of the right specification, the parts department of a manufacturer's dealer will be able to help.
Find out what you need to know before buying oil for top-up or oil change at TheAA.com.