Having tried all the other additives from the more established brands, I kept my expectations modest to avoid frustrating myself after making a high priced additive purchase. I followed instructions but never felt any difference after the idle run which some said it will be felt immediately. I drove the car for 30miles and then gradually noticed the improvement. Engine noise remains same however I can tell the roar is more refined and power transfer is way more seamless. Vibration was also considerably lessened and the overall ride experience has improved. I can tell that the engine is way more responsive.

Added to 2005 Subaru Outback using a quart of oil a week. Within 1000 miles down to 1/4 quart a week. Added 2nd bottle & within 1000 miles completely stopped using oil & the check engine light no longer comes on due to running rich! Great Product.

I've been using XADO products for several years now. I haven't had any major problems with equipment protected by their products. Their science seems sound.

Good for older engines to help cover any little grooves or nicks with ceramic. I would advice Auto youtubers to check this out.

This is the only vehicle additive I would use. Increases compression in worn out Tahoe motor. Used XADO transmission treatment on a bad slipping transmission and I kid you not, I got 28,000 approx. more miles out of it.