Choosing The Right Motor Oil

Motor oil is one of those items that most drivers take for granted. Everyone realizes that their cars need it to operate properly, but few know the differences between oil types. And fewer still understand viscosity ratings. The type you put into your car will have a long-term impact on the performance of the engine and can prevent it from experiencing excess wear and tear. In today’s column, you’ll learn about viscosity ratings, “straight weights,” and synthetics. By the time you finish reading, you’ll have a good understanding of which type of motor oil your car needs.

Viscosity Ratings

At its most basic level, viscosity means thickness. The higher the rating, the thicker the substance. For example, water is a low-viscous fluid while syrup is highly viscous. To understand what this means for your car and the engine, consider what happens when you start your car. The oil circulates through the car parts, reaches the valvetrain, and lubricates everything. High-viscosities (for example, 20W-40) won’t circulate as quickly as those with a lower rating (for example, 5W-30).

In cold weather, thinner solutions are more appropriate. They make starting your car engine easier, causing less wear and tear. That said, thicker viscosities are usually better for engines that operate at higher temperatures. For example, a tow truck with a V-8 that operates in extremely hot weather will be better served with a thicker lubricant because it provides extra temperature protection.

What Are “Straight Weights?”

Straight weights are single-viscosity oils. They’re not used very often in cars that are sold to consumers, but a lot of vintage car owners prefer them. Straight weights don’t have the temperature range that multi-viscosities do. If you insist on using them (and there aren’t many reasons why you should), keep a close watch on your engine’s temperature. Straight weights include 10W, 20W, 30W, 40W, and 50W. The latter two are generally used for heavy equipment, so don’t use them in your car.

Synthetics

The best type of motor oil to use are synthetics. They provide more protection from higher temperatures than straight weights or multi-viscosities and your engine will generally perform better. The only downside is the cost: synthetics are priced at nearly triple the cost of the others. But, if your budget can withstand the hit, they’ll provide a significant advantage over straight and multi-weights.

So, which type should you use? 5W-30 is appropriate for most new cars because it’s thin and circulates easier on a cold start. However, if you’re doing a lot of your driving on the freeway (high speeds equal high temperatures), use a 10W-30. And if you’re operating a performance car, synthetics are definitely the way to go.

Accessories For Your Car

If your car is a newer model, you probably won’t have any problem passing a smog or emissions test. However, if you’re driving an older model car, taking it in for an emissions test can be stressful. If your car fails, you won’t be able to renew your vehicle registration. You’ll need to make the necessary repairs and find used auto parts before your car can be tested again.

Unfortunately, mechanics won’t always be able to resolve the problem on their first attempt. So, you may end up having your car tested, repaired, and tested again before another trip the repair shop. And each visit means more time and money. To say the ordeal is inconvenient would be an understatement.

Below, I’ll explain why properly maintaining your car is the best way to ensure that it passes the emissions test. Then, I’ll describe how emissions test waivers work.

Good Car Maintenance

Car emissions tests are required by the government in the pursuit of cleaner air. If your car spews toxic gases and fumes, the government wants you to either correct the problem or stop driving your car. The most effective way to make sure your car passes the emissions test is to maintain it over time. There are a lot of things you can do to substantially reduce the emissions coming from your car.

For example, your catalytic converter should prevent your car from releasing pollutants such as carbon monoxide and nitrogen oxides. If it’s not working properly (a mechanic can test it), consider having it replaced. You should also replace your air and fuel filters regularly. Have your oil changed every 4,000 miles (or, according to your car manufacturer’s handbook). If you’re driving an older car, check the carburetor to make sure it’s functioning well. Anything that you can do to help your engine run cleaner and more efficiently will reduce your car’s emissions.

Settling For A Waiver

A lot of states offer an emissions test waiver to those people who can’t seem to pass the test after repeated repairs. The theory is that these drivers have made a significant attempt to comply, investing both time and money in the process. As such, many states will grant a waiver that helps drivers avoid the mounting costs of continuous repairs. The waivers are typically offered after the driver spends a certain dollar amount on repairs.

Facing The Inevitable

Unfortunately, in most states, you won’t be able to escape the mandatory emissions tests. Eventually, you’ll need to either pass the test or acquire a waiver in order to have your car registration renewed. Keep your vehicle well maintained and replace parts whenever the need arises. If you neglect to do these things, you’ll increase the likelihood that your car will fail the emissions test. And that can be… inconvenient.

Accessories For Your Car