The cons of having run-flat tyres –
- No spare: Vehicles equipped with run-flat tires carry no spare, which means they don’t have the jack or tools either. In fact, eliminating the spare and reallocating that space to some other purpose (styling, third-row seat, interior room, etc.) is a big reason why carmakers offer run-flats.
- Reduced tread wear: Rcent studies have found that people were replacing their run-flat tires an average of 6,000 miles sooner than owners using standard tires. Opinions differ on why this is, but one theory is that tiremakers put a soft tread compound on a run-flat tire to counter the hard ride. A side effect of the softer compound is a shorter tread life.
- Harsher ride: The stiff sidewalls that make a run-flat work also result in a harder ride. If the vehicle came with run-flat tires from the factory, the automaker usually tunes the suspension to offset the harsher ride.
The Pros of having Run-Flat Tyres –
- You can drive on a flat tire: The primary benefit of a run-flat tire is that it allows you to keep driving about 100 miles after all the air has gone. This means that a person doesn’t have to get out of the car in the cold, or the rain, or onto a busy highway or on the street in a sketchy part of town. Drivers will usually have to reduce speed to about 50 mph to get the maximum range. The owner’s manual will have exact figures for each tire/vehicle application.
- Better stability after a blowout: Because this tire can support the vehicle without air, a sudden deflation results in less weight transfer and tread destabilization. Steering and handling will remain near normal.
- Lower vehicle weight: With the spare and tire repair tools eliminated, vehicle weight should theoretically go down. But it’s not as much as you might expect, since run-flat tires weigh more than regular tires, due to the added sidewall reinforcement.
As you’re aware, the engine of your vehicle can get very hot from the thousands of small explosions taking place every minute; oil helps pull the heat away from the combustion chamber essentially preventing the engine from blowing up. As oil collects heat, varnish and carbons during the course of protecting and keeping the engine running smoothly, it eventually becomes less like liquid and more like sludge. No matter how good the oil is, eventually it degrades as the additives get used up. That’s when you should have your oil changed.
How often and what kind of oil should be used? It will depend on the type of oil you choose to use, what kind of car, and how often you drive. This is where your owner’s manual will come in handy. The old adage suggests every 3 months or 3,000 miles. The amount of mileage you drive is more important than the amount of time.
A well-tuned exhaust system has a number of benefits, with one being better fuel economy. So, pay attention to how often you head over to the pump. More trips than usual could mean your vehicle has a problem. Another helpful way to tell is if you have a newer model that tracks fuel economy on the dash. This will help you monitor month-over-month performance and catch a problem before it becomes serious.
Last but not least, the most obvious sign is a drastic change in the volume of your muffler. When working properly, the muffler should operate quietly in the background. When something goes wrong, it becomes a roaring monster. These loud noises are often telltale signs that you should have your exhaust system checked out by a mechanic.