i understand what you mean by some garages using it just for some easy pennies and that some flush will be left in the oil ways same as old oil but my rover which has the k series engine, well documented of blown headgasgets and the like has done 60,000 miles in the 3 and a half years i have owned it with a flush oil and filter every 4-5000 miles and never had an engine problem in my care although i did do the headgasget just after i bought it. and my skyline as well has done just around 16,000 miles in the year and a half i have owned it with a flush oil and filter every 4,000 miles, but as said if you dont want to use it thats fine but i have yet to see or hear of an engine failure as a direct use of flush,some garages dont use it as they dont understand it and tell peaple not to use it even though they have no knowledge of the product. anyway its up to you the owner if you use it or not either way whatever works for you.:dogpile: :dogpile:On many of my cars i've removed the sump and cleaned it out, which i believe is the best way to clean the crap out.
Many tuners i know and garages strongly dont recommend engine flush.
I know what your saying steve and i know Forte do some very very good products but in my eyes engine flush is a quick easy way for a garage to earn some easy pennies, plus engine flush wont cause an instant engine failure but it'll be something that will happen over time with the oil being ruined and broken down by the flush thats left around the engine.
Like i'm sure most of you know when you change your oil some gets left in there, its the same with the flush.