People ask us all the time if Steel Seal works on Diesel Engines. It does!! Here is a review from another Happy Customer:
Well I really put your product to the test with this extreme case of engine failure. I own a 1995 Chevrolet Silverado one ton dually 4×4 with a 6.5 Turbo Diesel. These high compression engines are known for their bad cooling design which can cause overheating and result in blown head gaskets, cracked heads, or worse cracked block. I don’t know which issue I had but I was getting oil in the water/coolant and tons of white smoke pouring out of the exhaust at 154,000 miles (possible cracked block around the number 8 cylinder based on tests). I installed your product exactly as the directions stated and just like that within 20 to 30 minutes no more white smoke, within 1 hour no more oil in the water! WOW! now it is many thousands of miles later and I am towing more than 10,000lbs and this high compression turbo diesel is still going strong!! Thank you so much for creating such an incredible product it really works! I have saved thousands of dollars!
Daulvin McCarthy, California