I read somewhere that Honda uses 5W-20 motor oil in the LX due to the slight improvement in gas mileage that a lighter oil provides. From what I read, Honda has to meet certain fuel economy criteria due to regulatory requirements and using 5W-20 helps them to do so. Is there a tangible benefit to using 5W-30 oil in the LX? I have heard that using 5W-30 will help the engine to run cooler. Does anyone know if this is true?

 

not true. at all. it will help in really hot weather that about it cause its bit thicker oil so it wont break down as fast

 

Houston can be pretty hot during the summer months. We see 90°F+ temps from June through September. The coolest it gets here is ~25°F and that is very infrequent.

 

You wont notice any difference between the two besides maybe a slight drop in MPG

 

Thanks for the info!