I put synthetic blend on a honda civic 237000 miles?

Honestly, without knowing much about oil, I bought a synthetic blend valvoline and put it on the honda civic like an idiot. Tbh, I have no idea why it has a lot of miles on a year 2000. But can anybody explain if this is a bad thing?

Why is my Honda getting horrible fuel mileage?

My '97 Honda Civic LX has always gotten great fuel economy. But here recently, I've noticed it hasn't been so great. So I decided to drive perfectly normal to test it. After I was completely out of gas, I put in 1.75 gallons of gas. I reset the trip odometer and went 15 miles. After that, I was almost out of gas because it was difficult to start. It has new plugs, wires, distributor cap and rotor button and does not hesitate or misfire at all. She runs beautifully but gets such horrible mileage now. Any idea why?

Should I get a remote start and alarm system on my 2015 Honda Civic Ex?

Should I get a remote start and alarm system on my 2015 Honda Civic Ex?

Added (1). So I'm buying a honda civic ex and it doesn't come with an alarm system, I really want to get one put on there but the finance manager there told me that if i get anything like that put on there that I need to be careful because if it ruins a computer chip or anything in it that it will not be covered in my warranty. So my question is should i trust a third party to do it or should i just not get it done? I mean hondas are like the most stolen vehicle.

Added (2). and also i don't know if he was just telling me that to get me to buy the extended warranty and another question is do you have any idea if the car place could install a car alarm that would be covered with the warranty. I can live without remote start but would really like a car alarm

How reliable are honda civic's?

I have a 2001 honda civic ex with 160,000 miles what should I worry about replacing like timing belts, oil change, tune up etc… It's a 4 cylinder vtec Single over head cam

My 98 Honda Civic Cranks But Won't Start?

One day when I was driving my car my water hose popped off and wet everything underneath my hood. We pulled to the side of the road and put the pipe back on and refilled the water. The next day it started to over heat so I pulled over and let my boyfriend check the water after the car being parked for a little bit It didn't want to turn back on.