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How I get 25 mpg out Explorer that are 17 years old. But most time I have no time so I see mostly 21-23 at 65 mph with my foot. Cruise Control doesn't do good on gas maybe 19-20.
When I bought used. It get 9.
Remove auto hub's mechanical because it stuck in 4wd It went up 12.
New 2 oxygen sensors 13.5-14
Replaced MAF sensor that improve to 15-16. Old one was bad
Air tires to max psi that say on tire I think 44 psi. Didn't notice little maybe.5-1
Replaced all exhaust system because cat converters were clogged badly from carbon. That DRAMATIC IMPROVE to 21 mpg on Highway without vacuum gauge
Vacuum Gauge is #1 important list for try save gas.
25 mpg on highway only happened during summer since we on winter blend so we see 19-20 but have bad head gasket so it basically run little lose power so I am on gas pedal slightly more than I do in summer.
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