Johnyang83 Neutral Newbie August 3, 2011 Share August 3, 2011 Hey guys, need some help here. Just bought a 2nd hand Mazda 2 1.5M. The last full tank I had got pretty good FC 14.7km/L (468km for 31.94L). However on the last top up, it only ran 12.4km/L (360km for 29.4L). Same type of fuel, same driving route(expressways mostly), same typre. Havent change my engine oil cause it was so called "new" engine oil from agent when I bought the car. Please help with this sudden drop of mileage. Cheers!!! ↡ Advertisement Link to post Share on other sites More sharing options...
Chucky2007 Turbocharged August 3, 2011 Share August 3, 2011 2 tank quite difficult to tell. I normally do an average.. Like using 3-5 fill ups and calculate an average fc. Link to post Share on other sites More sharing options...
Lanevomax 1st Gear August 3, 2011 Share August 3, 2011 Hey guys, need some help here. Just bought a 2nd hand Mazda 2 1.5M. The last full tank I had got pretty good FC 14.7km/L (468km for 31.94L). However on the last top up, it only ran 12.4km/L (360km for 29.4L). Same type of fuel, same driving route(expressways mostly), same typre. Havent change my engine oil cause it was so called "new" engine oil from agent when I bought the car. Please help with this sudden drop of mileage. Cheers!!! it also depend on - weather (cold or hot) - traffice jam conditions - carrying any passengers or load - any modifications Link to post Share on other sites More sharing options...
Johnyang83 Neutral Newbie August 3, 2011 Share August 3, 2011 Sounds like a good idea, I was thinking maybe the agent did not service it properly. So I was too early to conclude having a gd FC of 14.8km/l :( Link to post Share on other sites More sharing options...
Johnyang83 Neutral Newbie August 3, 2011 Share August 3, 2011 it also depend on - weather (cold or hot) - traffice jam conditions - carrying any passengers or load - any modifications Same weather, same traffic, same load, no modifications, Was wondering where did the 100km goes?? :( Link to post Share on other sites More sharing options...
Defi Neutral Newbie August 3, 2011 Share August 3, 2011 take out your spare tyre Link to post Share on other sites More sharing options...
Melvinyuen 2nd Gear August 16, 2011 Share August 16, 2011 http://www.fueleconomy.gov/feg/best/bestworstNF.shtml Toyota Prius 51 miles per gallon - 21.68 km per liter some forum hypermilers almost touch that wif normal cars [laugh] I am averaging at 25.7km/l now The key is as what i said do not floor the accelerator. and good maintenance of the car. It takes care of you when you take care of it. hahaha Familar hor... Link to post Share on other sites More sharing options...
Lsflsf 1st Gear August 17, 2011 Share August 17, 2011 Can anyone advise 195/45/15 what kpa to pump? Car picanto Link to post Share on other sites More sharing options...
Good-Carbuyer 1st Gear August 17, 2011 Share August 17, 2011 [laugh] I am averaging at 25.7km/l now The key is as what i said do not floor the accelerator. and good maintenance of the car. It takes care of you when you take care of it. hahaha Familar hor... Anyone done 28.83km/L or better? Link to post Share on other sites More sharing options...
Good-Carbuyer 1st Gear August 17, 2011 Share August 17, 2011 Can anyone advise 195/45/15 what kpa to pump? Car picanto You may find the recommendation on the door sill or glove compartment. Otherwise check with the AD Link to post Share on other sites More sharing options...
Carbine- Clutched August 18, 2011 Share August 18, 2011 drive slow, avoid jams. Link to post Share on other sites More sharing options...
BSBGARAGE Neutral Newbie August 20, 2011 Share August 20, 2011 release the accelerator pedal when approaching a red light and let the car roll to a stop. Link to post Share on other sites More sharing options...
Shor 1st Gear August 20, 2011 Share August 20, 2011 Wow....some hitting 14km/L still not happy. Mine hit 10km/L I very happy liao. My average 8.2km/L. Link to post Share on other sites More sharing options...
Csnewbie 1st Gear August 20, 2011 Share August 20, 2011 optimum tire pressure. Link to post Share on other sites More sharing options...
Zech Neutral Newbie August 15, 2015 Share August 15, 2015 Hi Ag123 Fully agree with you. No one can change the law of physics. There are many factors that can cause a vehicle to lose fuel efficiency. 1) Friction in the moving parts. 2) Too much traction from the tyres. 3) Misaligned wheels. 4) Faulty firing devices.... spark plugs/timing. (Confirm) 5) Insufficient air intake.... clogged air filters. (Confirm) 6) Over loading of vehicle. 7) Aerodynamics (applicable to only those who travel at very high speeds). 8) Weak batteries causing stress to engine trying to get it recharged. (Confirm) 9) Use of inappropriate fuel type. 10) Unreplaced worn out parts. Once drivers or riders are fully aware of the above and make effort to correct them, they can really experience the "trapped" power being released back to their vehicles. Note:- There is no INCREASE in power. It is the power that your vehicle originally delivers. As parts get worn and damages go unrepaired, these contribute bit by bit to the "power robbing devil". It takes conscious effort on our part to rectify the above list constantly. It does cost money but it will help to save alot in the long run. Our driving habit plays the biggest part in fuel efficiency and economy. Easily up to 30% improvement. Knowing what is enough to propel the vehicle from one point to another is crucial. We usually unconsciously use more than excess. It takes alot of effort to develop a sensitive "Feel" to our vehicles. Everytime we change rides, we have to start all over again. One need not drive slow to save fuel. We can cruise at higher speeds selecting the right gear for the right amount of torque for the existing traffic conditions we travel in. Then, using the built-up momentum, keep the vehicle as close to constant speed as possible. For auto car drivers like myself, i have learnt to fool the car into up-shifting earlier than usual. It takes alot of practise to develop that feel. I also try to avoid letting the turbo boost come into play. I watch the rev counter and boost counter closely when i need to accelerate. It does seem impossible to do all and have all. But if you really want it... You can do it. Link to post Share on other sites More sharing options...
cashman Neutral Newbie September 8, 2015 Share September 8, 2015 my F30 316i hits 13.1km/L. Link to post Share on other sites More sharing options...
Kinbalight 1st Gear September 9, 2015 Share September 9, 2015 do you guys remove the spare tyre from the boot to reduce weight? Link to post Share on other sites More sharing options...
MQX87511 5th Gear September 9, 2015 Share September 9, 2015 do you guys remove the spare tyre from the boot to reduce weight? of cause, can save a lot if your car is 1.6L below, about 10% saving 1.6L above, not so significant ↡ Advertisement Link to post Share on other sites More sharing options...
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