2012 Nissan Sentra

[bennyandthejets]

At 30,000 miles the only thing you should be changing (besides regular engine oil and oil filter) are air and possibly fuel filters. Stay away from dealers for service as they are typically more expensive and are really good at convincing you that you need a bunch of other services. You should get 100,000 miles before its necessary to change any more than the above, with occasional periodic visual inspections. Perhaps front brakes pads if you drive aggressively. You will not do damage to anything by following the above rules, regardless of what you hear other places.