People are always asking about which is the best diesel fuel additive for protection and winter driving conditions.
Project Farm does a very good job of testing several various brands and rating them based on his test results.
Worth watching the video to see how they all compare.

Are Diesel Fuel Additives a Scam? Let's Settle This!
https://www.youtube.com/watch?v=J9XC4AJ ... rojectFarm

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount
98 Dodge Cummins 24 Valve