Monthly Archives: May 2016
No, you don’t, according to every auto manufacturer we’ve talked to. The main advocates of the 3,000-mile oil change schedule are those who would profit by it: repair facilities, quick-lube chains and service departments at some new-car dealers.
Years ago it was a good idea to change the oil and filter frequently, but because of advances in engine materials and tighter tolerances, as well as the oil that goes into engines, most manufacturers recommend intervals of 7,500 miles or more.
Ford, Volkswagen and Porsche, for example, recommend oil changes every 10,000 miles. So does Toyota on several engines, including the Prius’ 1.8-liter four-cylinder and the Camry’s 2.5-liter four-cylinder. BMW says owners can go up to 15,000 miles between oil changes (with synthetic oil).
The intervals vary by manufacturer and engines, so consult your owner’s manual or maintenance schedule to see how often to change the oil in your vehicle and what type of oil to use. You may be surprised. We were surprised to learn that the Camry’s 2.5-liter engine requires 0W20 synthetic oil, for instance.
Manufacturers suggest you change oil more often for “severe” driving conditions, such as frequent trailer towing, extensive stop-go driving or idling in traffic, driving in extreme heat or cold, or frequent short-distance driving in which the engine doesn’t reach full operating temperature.
Some car companies, Ford and General Motors among them, equip most vehicles with oil life monitors that tell you when it’s time to change the oil based on vehicle speed, engine temperature, climate conditions, number of cold starts and other factors. They can all cite examples from owners who say the oil-life monitors indicated they could go even longer than the recommended change intervals.
If you’re nervous about going 10,000 miles or more between oil changes, then do it every six months, when you probably should also have your tires rotated (also explained in your owner’s manual). GM says to change your oil at least once a year even if the service indicator warning light doesn’t come on. With longer recommended intervals between oil changes, it’s more important to check the oil level at least once a month to make sure you have enough.
But to change oil every 3,000 miles is probably wasting money. Environmentalists say it also adds to the glut of used oil that must be recycled or disposed, and the state of California is trying to discourage the practice.
Actually, there is no such thing as a tuneup in the traditional sense of replacing parts to bring the ignition and fuel systems up to specs for maximum performance and efficiency, and there hasn’t been for years.
About the only things left from the traditional tuneup are new spark plugs, which is typically done every 100,000 miles, and replacing the air filter periodically. The federal EPA and Department of Energy say that replacing a clogged air filter will not improve gas mileage but can improve acceleration 6 to 11 percent. The agencies do not say what benefit can be derived from fresh spark plugs, but computers that control today’s engines adjust the air-fuel mixture and spark timing to compensate for wear, such as when the electrodes on spark plugs are worn down.
Even so, some car owners still dutifully take their car in periodically to have it “tuned up.” Instead, service technicians will inspect and perhaps test the fuel, ignition and emissions systems to look for faulty vacuum hoses, oxygen sensors and other parts that can hurt performance. The federal government, for example, says a bad oxygen sensor can give engine computers false readings and reduce fuel economy as much as 40 percent.
Having your vehicle serviced and inspected periodically is a good way to extend its life and keep it operating efficiently. However, walking into a repair facility and asking for a tuneup is a bad idea because it indicates you’re still living in the previous century and have extra money you would like to spend. Some in the auto-repair business will take advantage of those opportunities.
Look in the owner’s manual for your vehicle (or separate maintenance schedule) to find what the manufacturer recommends, and see if you can even find the words “tuneup.” For example, we looked at the maintenance guide for the Ford Fiesta that also applies to other Ford vehicles. The first mention of anything related to a traditional tune-up was to replace the engine air filter every 30,000 miles. The only other related item was to replace the spark plugs every 100,000 miles.
Most major oil brands market oil made specifically for engines that have more than 75,000 miles of wear, claiming that additives help reduce engine wear and provide anti-aging benefits. They are often a blend of synthetic and petroleum-based oils, and they typically cost at least a couple of dollars more per quart than conventional oils.
But are they worth the extra dough?
Some oils may be more beneficial than others because they contain conditioners purported to rejuvenate seals to prevent or stop oil leaks, a common ailment in engines with a lot of miles on them.
Internal seals and gaskets become brittle and shrink as they age, allowing oil to seep by. Sometimes this becomes visible as oil stains on a garage floor or as streaks of oil on lower engine parts. When valve-guide seals wear, oil can leak into combustion chambers and the engine will literally start burning oil. With small leaks, blue smoke from burning oil may not be visible from the exhaust, but your oil level will probably drop below the full mark on a regular basis.
The seal conditioners found in some high-mileage oils may reduce or eliminate small leaks and seepage by rejuvenating seals to their original size and shape. If an engine isn’t burning or leaking oil, or if it uses, say, less than a quart over 6,000 miles or so, switching to high-mileage oil may not be worth the extra cost for you. It’s really a judgment call if you should pay more for high-performance oil when your car has 100,000 miles on it but is using little or no oil. It doesn’t hurt and it could prevent leaks from starting. Most vehicle manufacturers would say it’s normal for an engine to consume some oil between oil changes.
In addition to having seal conditioners, high-mileage oils usually boast more detergents designed to clean out sludge inside the engine, plus other additives meant to reduce wear on moving parts. Every oil, though, makes similar claims that it does great things inside an engine.