Quote:
Originally Posted by Kmorpheus
Thats part of the problem, with the direct injection the gas does not travel over the valves. So all those fancy detergents wont do a thing to help clean out the crud built up from oil ingestion.
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Correct. There are tons of advantages with the DI, but that is one disadvantage, and in the future (next few years) ALL motors will be DI.
This issue is so bad on some cars the heads have to be removed and the deposits cleaned manually.
The degradation of performance and fuel economy from this is gradual so most dont know what is going on in their motors, and this is a perfect example.
A seafoam (or dealer upper induction cleaning) will help loosen and remove some of the deposits, but not all.
A properly functioning catchcan is a must on all cars and light trucks today.
