Modern engines, especially those designed in the early 2000s, often benefit from thinner oils that provide better fuel economy and reduce friction. Using a heavier oil like 10W-40 could potentially:
* Reduce fuel economy: The thicker oil increases engine resistance.
* Increase engine wear: The thicker oil might not circulate as effectively at lower temperatures.
* Void warranty (if applicable): Using an oil not specified by the manufacturer could void any remaining warranty.
Consult your owner's manual. It will explicitly state the recommended oil viscosity grades for your specific engine (there might be slight variations depending on climate). If you can't find the manual, you can often find a PDF version online through a quick search. The information displayed on the oil filler cap is also helpful.
In short: Don't rely on general advice. Check your owner's manual.
