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    Thread: Aveo Engine Oil Guide

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      Aveo Engine Oil Guide

      Hi,

      I own a Chevy Aveo LS 1.4. For the 1st 3 years i got it serviced from Chevy but after the free services got over, i switched the service station and also the engine oil. Last year i tried the Mobil 10w-30 Mineral Oil and the result was amazing.

      Mileage of my car went upto 17.28kmpl in the city without AC and i was quite happy with it. But now its been an year and the mileage has begun to drop so i would like to change the engine oil. I was thinking about switching to synthetic as i could go longer without oil change and also help the environment by dumping less oil per year.

      What Chevy recommends is API SJ Grade 15w-40,10w-40,10w-30,5w-30 and 0w-20 but i was thinking about either getting the 0w-40 Mobil 1 ULTIMATE ALL-ROUND PERFORMANCE or the 10w-30 Mobil 1 Extended Performance.

      Now my only doubt was that 0w-40's viscosity would be more than that of 10w-30 so would the higher viscosity cause more friction in the engine and reduce the Fuel Economy? Chevy used to put in 15w-40 and it never gave me mileage more than 13.5kmpl.

      I'd be grateful if anyone could help me out with it.

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      Quote Originally Posted by AshwinRaju View Post
      Mileage of my car went upto 17.28kmpl in the city without AC and i was quite happy with it. But now its been an year and the mileage has begun to drop so i would like to change the engine oil. I was thinking about switching to synthetic as i could go longer without oil change and also help the environment by dumping less oil per year.
      AFAIK, Fuel economy depends on your driving style and quality of fuel and not entirely on engine oil. I will tag some of the experts to confirm this tadukuttan blackhorn 007 mclaren1885
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      Honestly, I don't see a point in running synthetic for the last generation petrols. Instead I would use the best mineral oil and change it every 5000kms.

      Quote Originally Posted by AshwinRaju View Post
      But now its been an year and the mileage has begun to drop so i would like to change the engine oil.
      You mean to say, you haven't change the engine oil in a year? How many kms has the car done since the last oil change?

      If I were you, I'd just use the same grade as what the company recommends! And change oil more often!
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      Thanks for the reply guys.
      mclaren1885 - Yeah i haven't changed the engine oil in almost an year. The car manual says that i should change oil after every 10000kms or one year. Whichever is earlier.
      Recently my car has started running more than it used to, around 1200 to 1500 kms per month. I really don't want to keep changing engine oil and oil filter every 3 to 4 months. Extended drain period is one of the reasons i wanted to switch to synthetic.

      You said you do not see a point in using synthetic oil in last generation petrol cars. Can you please tell me why is that? I would really like to know.

      And can you please also comment on my question regarding the viscosity difference.
      camchennai - I agree that the driving style matters a lot but engine oil also makes a difference.

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      1 year without an oil change is not a good thing. I suggest you do not follow this practice here on.

      Quote Originally Posted by AshwinRaju View Post
      You said you do not see a point in using synthetic oil in last generation petrol cars. Can you please tell me why is that? I would really like to know.
      1. The company never recommended it. So obviously you car is fit to run on mineral oil. Unless you drive like a maniac, pedal to metal all the time or live in a place where temperatures are really hot or really cold, makes no sense.
      2. Unless you push the car like a lot of the racers do, you don't need synthetic oil. Infact, on most modded stage 2 cars, synthetic oil is pointless because you are never facing harsh conditions where synthetic oil would make a difference to the longevity of the engine.
      3. There is very little perceivable difference. I've tried synthetic oil on a lot of petrol cars like the Swift, Baleno, Getz Petrol etc and then switched back to mineral oil to find absolutely no difference. And you are paying 3 times the amount for a synthetic oil to run it for twice as long. Makes absolutely no sense.
      4. Also, I believe that the fresher the oil is inside your engine, the longer your engine runs trouble free. So changing mineral oil twice in 10000kms is always better than changing synthetic oil in the same duration. If you observe, the mineral oil will remain much fresh than the synthetic oil due to the relatively lesser change intervals. That is good for your engine.

      Quote Originally Posted by AshwinRaju View Post
      And can you please also comment on my question regarding the viscosity difference.
      I am not too good with the viscosity. You may want to wait for sgiitk and tadukuttan who are our in-house oil experts to help.
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      Quote Originally Posted by AshwinRaju View Post
      higher viscosity cause more friction in the engine and reduce the Fuel Economy
      the viscosity of the oil of different grades refers to the kind of condition they can be used in, in colder climes you need oils which are not too viscous in cold conditions, if they are too viscous at start up they will not lubricate the engine effectively resulting in unprotected/unlubricated metal to metal contact between the piston skirt/rings and cylinder wall, resulting in high wear and tear, which is why you have different indexes to tell you which oil you can use in colder climes

      am absolutely with mclaren on this one, it does not make sense to switch to synthetic unless you have high running and plan to run this car for a long time, it doesn't make any economic sense whatsoever to switch to synthetic, change with mineral oil at 5k and its enough to keep you engine happy for a long time to come

      here's a link to understand what those grades indicate vis a vis ambient temp
      http://www.jeepforum.com/forum/attac...sity-graph.gif
      Last edited by blackhorn; 7th Nov 2012 at 20:43.
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      Quote Originally Posted by AshwinRaju View Post
      And can you please also comment on my question regarding the viscosity difference.
      In addition to what others said, please do not use a ligther/less viscous oil, unless you are drag racing or similar. You will see good results for the short term, followed usually by a pre-mature deterioration of the engine.
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      Thanks a lot for clearing that out guys. I guess i'll stick to Mineral Oil only and try to change it every 5000kms or 6 months.

      I'd like to go for the Mobil Super again but if there is anything better then please let me know. I do not mind spending as long as it keeps my engine in a good condition.
      blackhorn- Does more viscous oil increase friction in the engine? i.e if i use 10w40 instead of 10w30, will it increase friction and eventually decrease the FE?

      Mods: My thread has been moved to the wrong section.I own the Aveo sedan and not the hatch back. Kindly do the needful.

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      Let me repeat what I have stated earlier many times.

      Oil is rated as xxWyy. xx is the viscosity of Cold oil. yy is the viscosity of the hot oil. xx should be equal or lower than what is the specification. yy MUST be equal or higher that the specs. Also, there is a quality index, which for a petrol is SJ, SL, SM, or SN (earlier grades are all obsolete as per API). A higher grade encompasses and exceeds a lower one. Some oil cos. (most PSUs) are still selling the lower grades. In Diesel the grades go Cx. Make sure you equal or exceed the specs.
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