BGDOC 32oz.

Use it every oil change

I’ve always taken good care of my Duramax. I’ve used these products for years. Don’t start using them until you notice a problem like a new “funny” sound. Use them regularly.

Good stuff. The dealer put in Bg DOC on my last oil change. I drove 10,000 miles on it. I noticed the engine idled better, runs smoother, better acceleration and improved gas mileage by 2 mpg. Sent in an oil sample to Blackstone. Report showed the oil still had good Viscosity. I changed the oil and added in another quart of BG DOC.

In short, I have a old 2002 Ford diesel E350 7.3 power stroke. I’m the second owner and have all service records. Those records show the dealer used this ‘ additive ‘ every time an oil change was done. So I use it too, and the truck does run very well. 150K miles.

This DOC combined with their fuel treatment drastically reduced the regens in my Titan XD Cummins! I went from getting a regeneration cycle every tank of fuel, to getting one every third tank....right at the 24 hour timer when the truck is programmed to regen automatically! Couldnt be happier!

All BG products I’ve tried are amazing. This is just another amazing product they make. I will have to post the color of my oil at the next change.