Millet were you present when the main dealer was pouring the engine flush into your engine ? Its an old con mate,adds a few quid to the bill.Engine flush is bad news,and if used on older higher mileage engines,very bad news.I've built hundreds of engines,some to a very high spec (race and rally) never have and never would put engine flush near them.Modern oils have detergents and emulsifiers in them,so no need for extra cleaning,just change your oil and filters regularly.Most engine wear occurs at start up,if you've removed the old oil and any tar,carbon,gum deposits with the engine flush,then