So I am reading it right you went from a single turbo to a twin?
For me going from no turbo to a single turbo put me about +2mpg in almost the same driving conditions as this time last year with out even trying.
I was using the block heater and grill block or grill blanket and still only getting 16mpg, I haven't even tried any of that.
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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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