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Well every RWD truck to 4x4 truck there is a weight difference of at least 500lb.
On my suburban adding 500lb makes a 0.5 to 1mpg difference in fuel economy.
To me having 4x4 stuff is 500lb less that I can tow.
Then you have all of that additional crap spinning all the time when you don't need it, that is at least another full MPG down the toilet.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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