Drew7a
Thread starter
Sevral reason's. I only knew abut the EC, and bought a 6 pack. The car was consuming oil and adding EC is cheaper than the keep on adding oil. I also have a lot of hoarded oil that I want to work through so it is cheaper to add the EC to the hoarded shelf oil ($1 or less a quart, with EC $16-20 per OCI) and get some cleaning going. I understand the oil does more cleaning.Cool progress, but really just two questions: other than cost, if your goal was engine cleanliness, why wouldn’t you have followed the 1 OCI with EC, then move to full HPL after that? The HPL oil will accomplish more cleaning over a full OCI than a 20% mix of EC & shelf oil.