What is the normal fuel consumption for injection type Toyota carina e 1.6 cc 4A engine? My 1995 Toyota Carina e car gives 9.5km/l in city and 12 km/l on highways. How can I increase it more? toyota carina e 1995 model 1.6cc

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    As the Carina is apparently a model sold in Europe, I was hoping to find a European version of the US's fueleconomy.gov but I could not. Anyone know if such a site exists? Also, for US readers, the OP is reporting about 22 mpg city and 28 mpg highway - seems a little bit low for a mid-size car but maybe not excessively so. Mar 1, 2015 at 17:59
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    For what it's worth, the closest US model, according to Wikipedia, seems to be the Toyota Celica. fueleconomy.gov reports that a 1995 Celica with a 1.8 L engine (smallest available in the US model), when new, was rated at 23 mpg (9.7 km/l) city, 31 mpg (13.1 km/l) highway. Mar 1, 2015 at 18:04

2 Answers 2

  1. Avoid idling
  2. Drive in Top gear when possible
  3. Keep the Tires inflated to factory specifications
  4. Avoid hard accelerations and decelerations

That sounds about right for that model. The only things you could do is make the car as light and easy running as possible, e.g.

  • remove the spare tyre and carry a patch kit and air compressor instead.
  • fill your fuel tank only 50%. This should save a good 20kg to 25kg.
  • go on a diet ;)
  • Get alloy wheels if you don't have already
  • inflate your tyres properly
  • take it to a tuner to remap the engine management unit. They usually lean out the air/fuel ratio to give you a bit more performance, but at the same time a leaner air/fuel ratio means you're using less fuel per cylinder stroke. This will make the car run slightly hotter, but seeing as it's not a turbo vehicle, it's not a problem.
  • Leaner ratio would not give better performance, unless it was too rich before. A lambda slightly below 1 usually gives best performance, but that means a richer mixture.
    – Allman
    Jun 30, 2015 at 12:54
  • A leaner ratio does in fact give greater performance. The problem with that is that leaner means more prone to knocking. A perfect petrol would be able to run at 14.7:1 under WOT, but because the extra heat produces knock, you have to inject extra to cool down the combustion and bring down EGT's. Manufacturers leave a wide margin for error, which you can fine tune based on how lucky you feel. Jun 30, 2015 at 13:11
  • If you are talking about the fuel consumption when you say performance, then I understand. You won't get better engine power on a lean mixture. Also when adjusting to a lean mixture, be cautious of your NOX emissions, they rise of you go too lean.
    – Allman
    Jul 1, 2015 at 8:02
  • I mean both. Fuel economy is the obvious one, but under WOT, cars are tuned to run slightly richer than they have to for reasons of safety and homologation. E.g. my Subaru has the Australian 98RON map on it, but it's so conservative that it runs perfectly fine on our 95RON South African fuel. There is a large margin for fine tuning which will gain a lot of performance for 98, but render you incapable of filling up with 95. Jul 1, 2015 at 8:20
  • en.wikipedia.org/wiki/Air%E2%80%93fuel_ratio#/media/… Maximum power and best economy is on different sides of the graph. The mapping can give you more performance and better fuel economy, but saying that it is because they lean out the air/fuel ratio is wrong.
    – Allman
    Jul 1, 2015 at 10:15

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