Originally Posted By: badtlc
Originally Posted By: Clevy
I wonder if one of those intake oilers would help DI engines deposit problem you could use something that is known to dissolve the deposits in the can instead of mmo or whatever.
Heck mmo might be the ticket. It leaves a very thin film on the entire intake stream and may just be enough to prevent the deposits from actually sticking and it could be as simple as a weekly high rpm,high load cruise on an interstate. Could that velocity be enough to suck the deposits off the valves if the mmo has left a slick layer to which these deposits cannot take hold.
Interesting. And wouldn't that just be the icing on top of dermapaint's cake. He's been using them for 30 years. My experience is only a few months however I certainly like the theory behind the product and for the pennies they cost to operate why not have one.
There are no known chemicals that can dissolve the deposits at this point without a soaking.
As per VW research, the deposits form when intake valves drop below 380 degrees F. The easiest way to clean them is to get the valves hot for 20+min. VW recommends 3500+ RPMs for 20+min on their engines and it has shown to be effective at cleaning existing deposits. Don't waste time with chemicals in the intake.
This is also why Mazda designed their skyactiv-g engines to keep the intake valves at 400+ degrees.
In otherwords, quite driving like your grandma and drive that thing like it's meant to be driven!