engine cleaning

Looking to clean out sludge from the engine at the next oil change. any additives you guys have tried and would recommend? I;ve heard stuff from 1 quart of ATF to adding diesel to the oil and running for 15 min. also aware of specific formulas for flushing engine to do the task as well. Open...

I recently bought an 06 jeep rubicon and everything’s been running great. I decided to take it to a professional detail place for an engine bay cleaning because the person o bought it from lived down a dirt road. After the cleaning was done i had it in neutral and it wouldn’t even roll down the...