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Mechanical Maintenance: Break-in / Oil & Fluids / Servicing Discussions on mechanical maintenance and servicing of your Camaro

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Old 08-08-2009, 10:26 AM   #1
jackka
 
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FOR BEST FUEL ECONOMY?

Amsoil, Mobil 1, Royal Purple, etc etc
Obviously all these oils are good enough, at least for me.

And according to the manual, 5-30w is best while 0-30w is also acceptable in cold areas.

So my question is, does either the brand or the viscosity/weight actually have meaningful differences in mpg?

Although I'm no expert, I would think on common sense that 0-30w would give me better mileage, at least technically.

So why does the manual recommend 5-30w?

What combination of brand and grade should I use from a cost effective point of view? All I want is a decent oil that is not overpriced and will give me the best mpg.
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Old 08-11-2009, 04:15 AM   #2
Gentry78
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it doesn't really matter between those three you won't see a difference in mpg's but maybe in other areas

and you should only uses lower weight oil if you live somewhere that has extreme winters and only during that time. the wider the range the less actual oil is in the quart so less protection and cooling effects
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Old 08-11-2009, 06:00 AM   #3
FI4T0MCAT
 
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Quote:
Originally Posted by jackka View Post
Amsoil, Mobil 1, Royal Purple, etc etc
Obviously all these oils are good enough, at least for me.

And according to the manual, 5-30w is best while 0-30w is also acceptable in cold areas.

So my question is, does either the brand or the viscosity/weight actually have meaningful differences in mpg?

Although I'm no expert, I would think on common sense that 0-30w would give me better mileage, at least technically.

So why does the manual recommend 5-30w?

What combination of brand and grade should I use from a cost effective point of view? All I want is a decent oil that is not overpriced and will give me the best mpg.
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