Why are motor vehicles built to go faster than the legal speed limit?

jjdrer

With Tyres in most cases "you get what you pay for". Cheapies do not last as long as some of the slightly more expensive ones fo. It also what air pressure you keep them at and how conservative driver you are. The more you have to apply your brakes the quicker your tyres wear. When we sold our last car it had only done just under 50,000km. It was only on its second set of tyres. The frist ones weren't that worn but had started to go sticky with age. I might add it wasn't driven a lot - mainly for the shopping and an outing about every 3 weeks. The furtherest it ever went was from Adelaide to Mornington Pens. in Vict. twice, to the Flinders Ranges 3 times and Mallala about 2 hours several times over a period of 20 years. Due to somebody rear-ending us at traffic lights one day (they were red) the Insurance Co queried the Mileage. Fortunately we had always recorded our mileage, amount of fuel we used and the cost in a log book., also service records., dockets etc. We used to average the fuel usage per km. It was a good way of determining if it was using more fuel than it should be.