I usually use Propel's Diesel HPR since totally bio-based, which lets me smugly hold my nose higher than Prius and Tesla drivers (CA electricity is now mostly from carbon power plants since the massive San Onofre nuke plant was shuttered). My 300D's idle smoother with it. It used to cost 10c/gal less than D2, but have seen it 10c/gal more lately. Might become cheaper when the new CA diesel tax is imposed (thanks Jerry).

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans