jdanielca

well did you read my post, clearly it is possible. if the car performs or exceeds EPA numbers on the highway and in the city it is 1/2 the EPA city numbers clearly there is nothing hugely wrong with the car but hugely wrong with the driving conditions.

oh does the manual say you can run 5w30? I need to read it again thanks for the heads up.

that sucks 😞 but good to know

The former is stock I assume because that is what is on my car. The roads here are very bad the former owner had a friend (who works at a ST) which is basically a garage/shop) with him during the 2 days we were processing the sale (yes... don't ask lol) anyways he suggested going 55 to compensate for the crappy roads... I do have better tires options if I go with 55, what are your thoughts on this.. Is there going to be rubbing or any issues? So what is the final word on it, will 55 fit? I need to decided today any help would be appreciated.

So heres an update: I realised that the previous owner filled it with 5W30 and i have no idea why... i have heard it being done on another forum too... WHY? What are they trying to accomplish? Anyways I did 600+Km x 2 round trip from Lviv to Kyiv these past 2 days.. I must say on the highway it is a HUGE difference I only needed 1/2 a tank to do 600+km thats what 42L thereabout? My infiniti G35X 2008 back in the day which maxed out at 110kmph because you know canada... people do 160 or more here routinely lol I needed a full tank to do Ottawa to Toronto... which is 70+L...... so highway miles I am getting EPA numbers (more than 25mpg) but as soon as back in the city....especially this city....lol it is back to 11mpg haha I am hoping switching back to 0W20 syn and new spark plugs.. air filters etc etc will make it a bit better...

those figures are from my comparison. but I have recorded figures again and will avoid filling the car till the light comes on and do another round of testing after I put techron and change air filters

A friend with a reader came and checked the codes 0 problems except for steering wheel not imobilised when car is locked.. so I assume some immobilizer failure. Everything else reads fine. I shall check the filters today. I am also bringing it to a pro next week. For now I just wanted to check that theres no HUGE issue that would cause BIG problems if neglected.

Hi guys thanks for the responses, the car was brought to a garage for checking, there were no error codes at that point, so they might have been cleared. I will check for codes again. Even if the check engine light lamp was disconnected do we have to physically look at this? upon start up it lights up like when you start your car all the lights on the dash flashup once no? So it cannot be disconnected. Let's see if there are any new error codes. I will post back. THANKS

Hi I'm a Canadian guy I live in Western Ukraine. Recently bought a 07 US Spec LS460L had it checked out looked good no issues. I have had the car less than a month. Other than driving it back from Kyiv I have had only city driving on mostly horrible cobblestone streets. Since I have been recording my mileage I have only had city driving plus one of town for about 120km total round trip. My mpg is horrible. I am getting about 23L/100KM. I've googled and they list of things to check is as follows: Dirty Oxygen Sensor: An oxygen sensor measures exactly how rich or lean the exhaust gases are when they leave the combustion chamber. The data is used by the vehicle computer to adjust the amount of fuel entering the engine. If the sensor is dirty or failing it can lead to a drop in miles per gallon. It can also lead to failed emission tests and a rough idle. Dirty Fuel Injectors: Fuel injectors spray fuel into the cylinders where it is mixed with air and ignited. Over time the fuel injector system can become clogged. This can lead to a drop in fuel efficiency as well as slow acceleration and the car not having enough power. If caught early, simply cleaning the injectors can solve the problem. As it progresses, the injectors may have to be replaced. Bad or Dirty Spark Plugs: Spark plugs ignite the fuel in the combustion chamber. If they are dirty or working incorrectly, it can cause the engine to misfire, leading to poor engine performance. This can lead to a lack of power as well as a big decline in fuel efficiency. Malfunctioning Mass Airflow Sensor: A mass airflow sensor detects the amount of air coming into the fuel injection system. It delivers that information to the vehicle's computer, which crunches the numbers and then delivers the proper amount of fuel to the air in the vehicle. A dirty airflow sensor will degrade fuel efficiently and lead to a rough idle and even stalling as the problem progresses. Misaligned Tires: Tires that are low or out of alignment can lead to a drop in fuel efficiency. Checking the tire pressure and have the alignment checked on regular basis can help prevent this problem. Defective Fuel Pump: Fuel delivery issues can drastically affect fuel efficiency. The fuel pump pulls fuel from the gas tank to the fuel injectors. The fuel pump can become clogged or malfunction. A bad fuel pump can lead to a rough running engine because it is not getting enough fuel. This will lead to a decline in gas mileage. If this issue is not addressed it will lead to a rough, idle, sputtering and stalling. Clogged Fuel Filter: A clogged fuel filter will also cause problems with gas mileage. The fuel filter screens out contaminants in the fuel, and over time it will become clogged. Fuel filters need to be replaced periodically. Stuck Brake Caliper: A stuck caliper on a disc brake or a stuck shoe on a drum brake can lead to a serious decline in gas mileage. In addition, any brake issue can make the vehicle dangerous to drive. If the decline in efficiency is accompanied by the vehicle pulling to one side, the brake system should be inspected immediately. Anything else you guys can chime in with would be appreciated. If there is anyone else in Ukraine who can provide advise on specific products to use.. in the US forums the recommend Techron fuel system cleaner but I do not know if I can get it here, might have better luck with a German or European product so recommendations would be appreciated. THANKS!