[Phil]

Had one Midel A and one flathead V8 that foamed. Pulled heads, flushed system nothing solved the problem. A little Rug Doctor anti foam, problem solved. Thousands of miles absolutely to problems. Don't add water oil stays clean. I don't know why they foamed. Some one on here said it was just masking a big problem, may be, but many miles and years have passed and they function well.