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Old 09-13-2017, 08:29 AM   #2
Tbos
Senior Member
 
Join Date: Jul 2014
Location: Solomons
Posts: 3,874
We don't really have any high altitudes in the east so I haven't noticed. Switching to synthetic oil made a 2mpg increase for me.


2016 Passport GT 2810BHS, 2016 F350 CC DRW
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Tom
2019 Alpine 3651RL
2016 F350 CC DRW
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