- Apr 5, 2022
wife got a 2021 hyundai elantra limited 2.0L. manual & oil cap calls for 5w20 and suggests shell/quaker state oils. i dont have a problem using those but would it cause any problems if i used 5w30 instead of 20? im not really concerned if the mpg drops some. im more concerned about engine protection as i think the 30 would provide a tad more.