When we get our project 300SD up and running it is getting an initial fill with "Coastal" dino oil from Autozone. We're going to run it maybe 30-45 mins of driving with that, then we're switching it over to synthetic Rotella (same day) and changing the filter again....we're looking at it as a "pre-flush" to get any junk in the engine out that may have gone in there.

The "coastal" stuff is certified diesel oil 15w40.....and its about $10 a gallon....since we're running it less than an hour....it shouldn't matter.

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