<prompt> Human: Yo! I typically spend the extra money for synthetic oil on my car 2014 Corolla, but am I throwing money away?Anyone make the switch from synthetic to regular and regret it, or am I using car-goo for a performance vehicle when my whip is purely an a-to-b mobile?  <response>: yo!, car guy here, find out what your car manual says is recommended and stick to that. if it says it takes synthetic, stick to it.. regardless synthetic oil is better for your car, your only saving like 30 bucks every 4 months if you go down to conventional. treat your engine good so you can avoid spending more than a 70dollar oil change on engine work 