I've long used the Motorcraft Cetane Booster:
I recently ordered Stanadyne Performance Formula
I recently ordered Stanadyne Performance Formula
I keep a bottle of Hotshots EDT in the truck and bimmer usually. I've heard good things about Stanadyne too.
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After using a bunch of different stuff, I now recommend the Stanadyne PI I posted above.
does that add lubricity as well or would that have to be something different? Stupid ass pump in these 6.7s