yes, when the valve opens, a very hard vacuum impinges in the valve guide, to stem.
going down a hill with foot off the throttle, the vacuum can be 25 inches, easy, (that is why this is worst case for smoke) and will suck oil
from the top of the head, if the guide clearances are wrong, (or cracks, etc)
it can be real bad too.
you might try a hotter plug as a band aid.
it might burn off the oil , better.
that is the problem with cute complexity, CCV, whatever, more parts to break or crack.
what a bummer having red gas. to make things, seem odd.
if it was real gas, it just be , amber oil fouled.
i wished id saved my purple spark plugs for show an tell.....
going down a hill with foot off the throttle, the vacuum can be 25 inches, easy, (that is why this is worst case for smoke) and will suck oil
from the top of the head, if the guide clearances are wrong, (or cracks, etc)
it can be real bad too.
you might try a hotter plug as a band aid.
it might burn off the oil , better.
that is the problem with cute complexity, CCV, whatever, more parts to break or crack.
what a bummer having red gas. to make things, seem odd.
if it was real gas, it just be , amber oil fouled.
i wished id saved my purple spark plugs for show an tell.....
http://www.fixkick.com