Sign company just mixed up verbage from different signs.
There are NON-Highway Use diesel sign that warns 'Federal Law prohibits use in highway vehicles'.
Then there are ULSD Diesel signs where it states required for use in 2007 and later and recommended for all engines
Then there are new ULSD DIesel signs where it states required for 2011 and newer and recommended for all diesel engines
And many other variations............just check out a Federal Reg.
No wonder sign companies mess up
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31