Bests & Worsts Reviews from Amazon

I bought a used vehicle pretty cheap, 2011 Subaru Impreza STI, it has high mileage and suffered it's fair share of neglect. Oil in this car had obviously not been changed in a while, and it definitely didn't get regular oil changes for a decent amount of mileage. I began trying to clean out the engine by doing oil & filter changes every 2500 miles. After four of these, I wasn't making any progress. Oil was still turning black pretty much the next day after changing. After reading reviews I went out on a long shot and tried this product. I was extremely surprised to find just how well it worked. Granted all these newer vehicles use Synthetic Oils, so I did not see any sludge in the drain pan, but the oil poured out blacker than the blackest night you had ever seen. After one use the engine was significantly cleaner, and it took a couple weeks before the oil was dark black again. Another 2500 miles later I used it once more, and now my oil almost looks new at 5000 miles. I'd say one more use and I'll be good to go for quite some time. Very happy with this product! As an added note, my car is Turbocharged, and I was concerned if this engine flush was Turbo Safe, so far I have not faced any issues going on 10,000 miles since first use. Hopefully this helps someone else with a turbo car make a decision on this product.