When you romp on the pedal, you should see black smoke.
If you want to minimize it, either run a small bit of BioDiesel or use Stanadyne Performance Formula in the recommended proportions.
-Steve
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1997.5 HMC4 Hummer H1 w/Slantback shell (Mine)
2006 Hummer H3 Adv. Package (Wife's)
M101A2 Trailer
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