The owner's manual is no help: does manual shifting help mileage? on 2012 Volvo XC70

Should i use 4th gear for highway driving, or just stick to Drive in automatic?

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2 answers 2 comments
yes that is what it is there for
use the last get for highway it will give you the best mpg
thanks for the response, but I believe I need assistance. What is "last get"?
OOPS SORRY LAST GEAR. MY BAD