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Originally Posted by DGthe3
The weird thing with the LF3 vs LT1 is that the V8 seems to have been tuned more towards fuel economy rather than power, while its the opposite with the TTV6. So much so that it looks like the LT1 is the more efficient engine overall. It would be one thing if the V6 were more efficicient, while the V8 made more power. But if the V8 has the edge in both ... the LF3 becomes a pretty hard sellto the average buyer.
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I'm not sure where you are getting this information about fuel economy. So far the LT1 has only been EPA certified in the C7 vette and the LF3 in the CTS Vsport and XTS Vsport. So we don't have a common platform to make comparisons of fuel economy.
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The only reason why the L99 exists is because an LS3 automatic would probably have gotten slapped with a gas guzzler tax. It wasn't really done to offer buyers a choice between 26 hp or 1 mpg.
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I think you are basically saying the same thing as me. They could have given the SS just the L99 with either a M6 or A6. For what ever reason, they offered both so I don't see why not with the 6th Gen as well.