Back before the blue VW factory coolant went extinct I compared the 
"ingredients" of that VW coolant with Honda factory coolant. Exactly 
the same for the first 6 or so listed and the last few the same in 
different orders. It has worked perfectly for me for almost 10 yrs. 
with the same engine. Having worked in the service depts. of Honda and 
VW I can attest to the Honda being about 1/3 the price of the BMW 
Pentosin. I do have some of the normal seepage from the heads during 
the change of seasons, but hardly enough to change the level and never 
visible on the ground-only detectable by slight odor. I usually add 2 
of the small Subaru cylinder head conditioning magic to the coolant if 
I have to drain it completely to change a hose or tank. YMMV.

David Clarkson
Equipment Consultant
Southern Automotive Garage Equipment
sageautoequipment.com
dvdclarksn@aol.com