Once upon a time this was the only way to clean up an engine, and I remember pouring from Coke bottles.
Normally I just use Techron or my version of it. This picture is of the head on my Toyota pickup with 280,000 miles. The head cracked above the exhaust valve in the cylinder on the right, allowing steam to enter the combustion chamber for a few miles before noticing the white exhaust.
The crack is circled in the other picture.
The left cylinder in the picture shows how the Techron type product every 5000 or so miles for the last 50,000 miles kept it pretty clean.
Normally I just use Techron or my version of it. This picture is of the head on my Toyota pickup with 280,000 miles. The head cracked above the exhaust valve in the cylinder on the right, allowing steam to enter the combustion chamber for a few miles before noticing the white exhaust.
The crack is circled in the other picture.
The left cylinder in the picture shows how the Techron type product every 5000 or so miles for the last 50,000 miles kept it pretty clean.