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Old 09-24-2014, 12:15 AM   #1 (permalink)
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Default Oil change

I drive my 2006 120 miles per day to get to work, and am doing everything I can to try to get my mpg up. The best I have achieved is 28mpg and rarely get that. So I was wondering, has anyone used a thinner oil in the Verona? I am planning on trying 5w20 or 0w20 as opposed to the recommended 5w30. Any thoughts?
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Old 09-24-2014, 05:43 AM   #2 (permalink)
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Thinner oil is going to do nothing except shorten the life of the engine, especially one doing decent miles like yours. Stick with the manufacturers specs and check the basics like plug gaps, air cleaner and tyre pressures, even a 2 psi change can make a big difference in mpg.
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Old 09-24-2014, 11:56 PM   #3 (permalink)
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Why do you feel it would shorten the life of the engine?

I keep on top of proper gap and air pressure and regular maintenance, and it gets me the normal gas mileage-which I am not whining about. I am just wondering if there is a way to get a little better.
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Old 09-25-2014, 05:56 AM   #4 (permalink)
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Engines are designed to run on a specific oil viscosity which is based on ambient air temperature, which means that thinner oils are designed for lower temperature operation and won't be thick enough to provide adequate lubrication at higher temperatures.
If you are in Alaska driving in the snow, then a 0W30 or a 5W10 would be fine, buit if you are in somewhere with 90 degree temps, then running anything less than a 5W30 would mean the oil would be too thin, resulting in less clearance between moving parts, less heat carrying capacity and more wear.

I seriously doubt changing oil viscosity from manufacturers recommended spec will improve economy, but feel free to prove me wrong. Its probably easier to tape an egg to the gas pedal and develop a "feather foot" to improve gas mileage.
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