Reply to "500 BHP 351 Cleveland"

George and Mark,

Thanks for the efforts.

In the case that Geroge refers to, with oil getting into the intake ports, the oil would burn and would be visible as blue smoke. Correct?

Mine is blowing out - or by - and is unburned. No smoking ever.

It was suggested that my motor was still new and hadn't seated yet and the synthetic was too thin during break in. Possible, since I hadn't done much mileage. But now it's got at least 2,000 miles on it.

When I used the synthetic I had tiny clean droplets of oil on the rear window glass and across the rear face of the car above the bumper. Since I changed to non-synthetic I get no dropslets, just a thick dark yellow, dry, oil film evenly across the rear, edge to edge above the bumper. And consider this, it is not evident on short trips or stop and go driving. Only during long runs (2+ hrs) on the highway.

When I put my foot down, guys behind me have said they see a puff of black. But only for a second. After 2 hrs on the highway, I have a nice thick black sooty collection on top of the bumper just above where the exhausts exit. I know I am running rich (I don't see the downside there) but don't want to confuse the two issues. The inside tips of my exhaust pipes are black and soooty but not oily or greasy.

I'm still stumped.