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What's the dealio with mpg?

546 Views 4 Replies 5 Participants Last post by  JW
As far as I understand, the IS uses an engine similar to the GS300; why is it then that the GS gets marginally better gas mileage even though it weighs 300 lbs more and has 5 more hp? I is confused...
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nope, GS300 doesn't get better mileage than IS. I can tell you this because my dad has the GS and I have the IS, and I am getting at least 1 mpg better than him, and he is the more conservative driver of two.
1 - 1 of 5 Posts
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