Stanadyne Lubricity Formula

mjs2011

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I kinda understand the blue smoke from the TC-W3. Similar to an old 2-stroke dirt bike, a bit of blue smokey exhaust from the 2-stroke oil.

But the smoke I am seeing is Very Dark gray to coal black. Its not like the grey smoke you usually see from additives. It just seems odd because this truck has never smoked like this, with either the old pump or the new one. This is probably the third tank of fuel on the new pump when the black smoke showed up.
 
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