I recently started learning about cars, but two of my friends have contradicted some of the advice I’ve received. I’m trying to figure out if they’re right or if I am. Most of our discussions revolve around OEM parts. I tend to buy a lot of OEM parts because I was told they’re the highest quality available for my vehicle, and since I don’t plan on modifying my car, longevity is my main goal.
However, my friends insist that buying OEM is never a good idea. Here are a few examples of our debates:
Coolant: They argue that it’s unnecessary to buy OEM coolant because Canadian law requires off-brand coolant companies to disclose their main ingredients. Therefore, non-OEM coolants are essentially the same quality as OEM ones.
Windshield Wipers: I’ve read that OEM wipers are preferable because they’re precisely sized and apply the correct amount of pressure for my car. My friends dismiss this claim, saying that universal wipers from brands like Bosch are just as effective.
Brake Fluid and Engine Oil: We all agree that OEM isn’t necessary for these fluids.
OEM parts are almost always the best choice. For items like fluids or wipers, the brand isn’t as critical. I’ve owned a Ford for a long time and usually get Motorcraft parts whenever possible. However, many shops use O’Reilly’s or NAPA branded parts because they are generally high quality without the name brand markup.
For wipers, I always recommend Bosch. For your Mustang, it’s really simple with J hooks—easy as that. For spark plugs, I always use NGK, as that’s what Motorcraft uses if I remember correctly. Autolites are garbage and always fouled out the few times I used them.
For components like intake manifolds, sensors, or wire harnesses, I would only use Motorcraft. For fluids, the most important factor is ensuring you use the correct viscosity or fluid type. The brand doesn’t matter as much—5w-30 is 5w-30, Dot 4 is Dot 4, etc. I have 180,000 miles on my Ford, and it still doesn’t leak or burn any fluids. It still drives almost like new.
