Posted for "Lancair" <lancair@USTEK.COM>:

 I have one.  Major problem for turbo engines because pre-oilers pump oil out
with no scavenge pump to pull it back.  Oil fills the turbo sump and you end
up with a smoke generator and oily belly.  Mine is now 5 sec for pre-oil and
standby in case of main oil pump failure.
 
 Robert M. Simon
 ES-P N301ES

"""
 Does anyone have an opinion about the electric engine pre-oilers?
 Suggest a company to research?
 
 Craig Berland
 IV-P TSIO550
"""