Guys, Sorry to be a pain but I have a further question. Following on from my previous discussion I have measured the overall consumption (Mini Cooper 2002 CVT), on town driving , stop start, short distances say 14kms at a time. The average fuel consumption is about 10.2 litres per 100 klms. Is this about right. Again sorry to be a botheryou, would appreciate your feedback. At this stage also the car idles at 8-900 rpm in drive without air conditioning on, and about 1100 with air conditioning on. Is this about right? Many Thanks Phil
Hi Phil, your fuel economy sounds right for the CVT Mini. I have one, and find that around town the economy is not as good as you might expect for a small car. I'm getting the same as you. Out of town, I get from 6.5 to 7.5 l/100km depending how I drive.
Regarding the idle speed, the airconditioning compressor requires a higher idle speed otherwise the engine will not be able to maintain a steady idle. I had problems early in the life of the car with uneven idle speed, and BMW upgraded the software - solved the problem, and left me with a higher idle speed (just over 1000 rpm) with aircon on.
What year will it be when the value of the software in a car exceeds the value of the hardware?
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It is impossible to say because of all the variables involved=== Speed --terrain---climate conditions--load --city, country driving--drivers driving habits ( heavy footed , always on the brakes) road conditions --tyre size--tyre pressures--- current draw from the alternator ( extra radio gear )-- roof loads . basically if you get 10 litres / 100 klms it will be average . There are some good auto magazines that include fuel consumption when they discuss different vehicles.
REPLACE AIR FILTER.CLEAN FUEL INJECTORS,CHECK TIRE PRESSURE.LOW TIRE PRESSURE WILL CAUSE LOT OF FUEL CONSUMPTION.CITY DRIVING WILL BURN LOT MORE GAS,STOPPING VECHICLE THEN GOING WILL CAUSE MORE GAS BURNING, YOU NEED POWER AND FUEL TO GET VECHICLE IN MOTION,BY IT BEING HOT WEATHER, USING AIR CONDITIONING TO KEEP COOL INSIDE WILL CAUSE MORE FUEL CONSUMPTION.
As you have not stated the vehicle MODEL or Year of Manufacture, I will provide a 'general' solution:
There could be numerous causes for high fuel consumption, but if you have used this amount of fuel in such a short journey, there would have to be leaking fuel somewhere.
However, the only true method to measure "ACTUAL" fuel consumption (disregard trip computer) is:
- Completely fill tank to a pre-determined point inside the fuel tank filler tube.
- Set your cluster Trip Meter to: 0000
- Drive vehicle for 6 - 15km and return back to the same gas station pump used previously.
- Completely fill tank to the same point inside the fuel tank filler tube, where filled previously.
- Note the quantity of litres required to fill to that same point in the filler tube.
- Divide the litres used, by the total Km travelled on your Trip Meter.
- If the value calculates less than 20 (carburettor engine); less than 15 (EFI engine), then consumption is acceptable.
Note: if value is above these numbers, then you have a fuel leak, or a problem with your vehicle's carburettor adjustment. EFI engines can have numerous causes, including electronic sensor faults etc.
If your Mini is the CVT automatic, the problem may be software-related. There was a software upgrade issued under warranty during 2002 / 2003. It would be surprising if your car missed out on the upgrade - but worth a check with your Mini dealer.
Next thing to check is your car's battery. If the battery is getting old (and the original battery in a 2002 car would be OLD), you should consider replacing it with a similar high-output battery. The CVT transmission needs plenty of electrical power to operate correctly. After replacing the battery, the transmission will take a couple of days to re-learn your driving technique and return to its original honey-smooth operation.
If the battery replacement doesn't fix things, I regret to inform you that the dealer will become your best and most expensive friend.
Checked brakes for possible wheel(s) dragging, as well as tire pressures up to max recommended pressure, and observe if tire wear unusual, signifying improper alignment? Any difference in engine oil grade used?
The manual has a mis print, according to MINI the correct oil to use is ESSO CVT Z2L 799 fluid and there are no other manufacturers that use it so sorry but you will have to buy it from the main dealer.
The only way to check the trans fluid is to drain the fluid right out of the trans pan. There should be 5 liters. The only way to get the fluid in is by pumping the fluid back in by means of the fill plug on the lower front of the transmission. I believe it is a 4 or a 6mm allen to remove the plug. Whatever you use to pump the fluid back in needs to seal where the fill plug is because fluid will pour right back out. I would change the fluid at least every 50k.
Mini's have had problems in the past with the shift cables coming off or breaking. No worries: the only danger is that you will be stuck in the gear you where in when the cables break. No damage to the car will occur. You should check out the recall notices. Good luck