Originally Posted by Wildhare
You might try pressurerising your cooling system and using a stethoscope to locate where the air is leaking into engine.This may give you a general area in which to look at.Also is it possible that you have a engine oil heat exchanger tied into the coolant system?I know the V10 have this as the coolant lines run down to the oil filter adapter.
The engine oil cooler is a real possibility, since my SMB has an OEM towing package. My guess, from the amount of oil in the coolant, is that the leak may be too slow to find with a stethoscope, but it cannot hurt to try.
And yea, Mike, I think it is a no brainer to try the cooling additive. Even if it doesn't work and really screws things up, I'd have to replace the engine anyway. Besides the small additional cost, what's the downside?