Operating costs for Quantum? 1, Fuel consumption l/100km 2. Tyre cost unit cost R/tyre 3. Tyre life months 4. Maintenance/service cost 5. Maintenance/service interval 6. Repair cost over 5 year

run a quality injector cleaner
the difference is slight so it could be ambient temp differences affecting engine performance, more ac operation, tyre pressures to low , different operating conditions even incorrect bowser readings if using the same service station all the time

well to check that u need a fairly long trip and a full fuel tank because u know how many litres is ur tank so it become easy to work out , fomular is amount of kiloz trvelled and fuel used, and is calc on L/100km e.g 50l of fuel used over 700 km 50/700 x100km =7,143 so ur car is 7,143 pr 100km. the longer the kms the less l/KM , e.g 50L/900x 100km=5,556l consumption is 5,556L/100KM, hope this help

tyre rotation is from front to back on the same side of the vehicle . It is recommended by tyre shops as it is good for business ( 4 tyres instead of 2) The other down side to tyre rotation is that you do not get a good idea of wheel alignment problems to know what to fix. Next down side is that once a wear pattern has been established that pattern will continue because the tyres are radial construction
Front drive cars wear out the front tyres in 1/4 the time that it takes for back tyres and a faulty tyre will have a wear pattern that indicates wheel alignment/ driver abuse but in fact is from case construction.It is something that I have not recommended since radial tyres came into being.

Check the following:
1. Element air cleaner.
2. Tyre inflation.
3. Brakes engagement all the times.
4. Fuel pump pressure.
5. Fuel system.
6. Ignition system.
7. Oxygen sensor.

Aditya,

The following need to be checked and corrected:

1. Tyre pressure. Low pressure will cause problem.

2. Clutch adjustment. If over then will lead to excess consumption.

3. Clean carb and well adjusted slow running.

4. If consuming more oil (most likely as your bike is 5 years old) then new oil scrapper ring. To check this insert a finger in the exhaust and if your finger comes out black with oily soot then it is the oilscrapper ring gone.

5. In the carb, check the fuel jet needle. If over then replace.

6. Check if brakes are adjusted properly.

7. Check the pulling power. If low then the rings need to be changed. (read this with 4 above.)

There are a few websites that have the official fuel consumption information for a new vehicle. Just google "1998 toyota spacio specs" and you can look it up.

The consumption you will achieve on one of these cars (now 12 years old with lots of miles driven) depends upon:
1. how they are driven; and
2. how they are mechanically maintained; and
3. running sufficiently high tyre pressures to minimise rolling resistance; and
4. the octane rating of fuel used and whether or not it is an ethanol blended fuel.(You will need to consume more fuel for the same distance traveled if using an ethanol blended versus a straight non-ethanol fuel).

A poorly maintained vehicle will usually give poor fuel economy as will one that is driven hard.

No, this is not normal, But depends on your driving style and road conditions, You are currently getting about 10 miles per gallon and you should be getting almost twice that amount, Have a full tuneup done to improve some of this and have it checked for fuel leakage.

Yup nice question. For any vehicle accurate tyre pressure will give you better tyre life, low running cost, etc. Here is a chart for car tyres click here.
For bikes i havent found any chart. basically in india rear tyres having 100/90 18inch maximum tyre pressure is 32psi. front tyre having 2.75P or 80/90 18 inch uses 24 psi pressure. and do check your tyre pressure twice a month.

Brad

1. It's hard to say without looking at the vehicle (and test driving it) but more than likely the front end is badly out of alignment. ( If the car has been in a significant front end accident and badly repaired then this could also be a source of the problem as the alignment may not be capable of being properly set).

2. The first thing to do is take the car to a specialist suspension and steering shop and have the wheel alignment checked and adjusted to factory specs. Normally this is not expensive for a straight forward alignment but price depends on the shop. A good suspension shop will also identify if there are any wear problems with the steering or suspension that need attention

3. Older drivers sometimes frequently hit kerbs when parking their cars. This will throw out the front wheel alignment every time (and damage tyres) so it must always be avoided. Scrubbed.scuffed tyre side walls are an indication of this as well as scratched wheel rim edges.

4. Some drivers never check tyre pressures. Low tyre pressures will cause much greater tyre wear as there is more friction. (It will also make steering heavier, place undue stress on the steering components, cause the car to handle badly and result in much higher fuel consumption).
The lady needs to ensure her car has at least 32 lbs pressure in both front tyres and at least 30lbs in the rear (which carries less weight). The pressures must be set with COLD tyres. Manufacturer optimum spec tyre pressures are usually set for comfort. These can be safely exceeded by a few pounds. It is far safer (and more economical) to run slightly higher pressures than a setting that is too low. (A good tyre will run all day with 38-40 pounds pressure and 36-38 is quite safe).

5. Worn out shock absorbers will also contribute to abnormal tyre wear. 70000 miles of average driving will see out a set of shocks. (Personally I would not leave them that long as the factory shocks are generally of average quality on this type of car)..

That's the best I can do Brad without seeing the car so I hope this helps some. Hopefully a good wheel alignment will fix the problem but make sure the tyre pressures are kept up as well. If the shocks are worn out they will also need to be replaced if the car is to be roadworthy.

Cheers Sean