355 to 308 ratio?

[earnies2]

(04-15-2022 )tree98 Wrote:  You can expect to beat the liners out of your engine prematurely. Gears that tall will keep you below 1500rpm to often. Why not just drive 55-58 mph and keep your boost as low as possible as often as possible. Get the 7.5-8 mpg you mentioned and pocket all the money you save on fuel.

Are the liners and engine differant on a 2018 versus my 2009? I'm basing my facts on all the newer trucks all have tall gears and get way better fuel millage than my 2009.
Please explain.