Low mileage of 1990 BMW 525 i?

Question

hello Geeks,
I  have a 1990,BMW 525i.I am getting a mileage of 7kmpl which I think is very low.I have made the following things in my car.
1.Cleaned the fuel injectors by a professional in a garage. plus also by adding STP fule injectors cleaner
2.Changed all six new spark plugs
3.Replaced  the fuel filter with new one
4.Replaced  the air filter with new one.
5.Maintaining the correct  tyre pressure.
6.No rash driving only smooth acceleration and brakes.
7.Changed Engine oil  and filter ,Gear oil and filter.
8.Removed, cleaned the Mass Air Flow Filter  with Carb clean  and refitted properly.
9.Lubricated all the linkages of accelerator cables.
10.Adjusted the  recommended idle speed(760 +- 40 rpm)
11.Replaced the radiator fan clutch and checked the working of the radiator.

Please let me know anything further can be done to increase the mileage of my car.

One more doubt  my dashboard messages shows sometimes as folows "CATALYST + OWNER'S HANDBOOK".

Mack · Accepted Answer

The catalytic converter seems to be the only thing left to replace. If you really want to keep, and drive this car, replace the catalytic converter. If that doesn't cure it, you have a REAL problem.

Anonymous · Answer

The M20 motor is a pig when it comes to gas mileage they used the same motor in the 325i and is and it was only rated 19-22 in a car that is a lot lighter then yours

robert KS LEE. · Answer

12) add some nano fuel saver into ur petrol tank 4 better pickup n fuel saving.
13) switch off aircon if necessary.
14) maintain ur speed at 80 kpm n below
15) don't carry heavy items in ur car.

good luck.

Anonymous · Answer

7 kilometers per liter? That's 17 mpg....that's not bad at all for a 525i.

I don't think you have anything to complain about here....

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Low mileage of 1990 BMW 525 i?

4 Answers