Ive noticed that mostly when I am traveling at speeds ranging 50mph or higher the car starts shuttering/shaking. When I give the car more gas or less on the pedal it stops but It will start again later down the road. What are some things I should check out? Im gonna check the throttle body and the injectors. Im pretty sure one of the injectors needs to be replaced but have been putting it off for some time. The car is leaving more oil on the oil pan on the driveway compared to usual. Thanks for any help.

 

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