Need opinions on the best spark plugs for a 2013 Elantra gt.

 

The manufacturers spend a lot of $$$ to decide on what will provide the best longevity and performance of their model and engine.

There are all kinds of offers out there to maybe provide better performance, but you will usually see better performance after replacing any worn spark plugs.

Until then I would suggest to stay with the recommendation in your owner's manual.. They aren't going to make any more $$ from you now.