Quote:
Originally Posted by KS circutguy
Great info here;
short video.
https://www.youtube.com/watch?v=zyy7ZekQ8do
more info;
The Automobile Association of America (AAA) conducted an independent test on the impact gasoline detergent levels, and the results were quite shocking! This video reviews the results from that report and provides context as to the ramifications of fuel injector deposits. https://www.aaa.com/AAA/common/AAR/f...ull-Report.pdf
Gasoline engines must atomize and then vaporize the fuel for it to burn. When injectors have deposits, they don't atomize the fuel as well as clean injectors. As such, fuel dilution of the motor oil increases, which increases engine wear.
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Nice video. Thanks for posting.
In our shop, my experience has been injectors do not get clogged the way they did 20-30 years ago. We used to clean them regularly, now rarely. Not once a year. Less than that.
We do however see a lot of engines using oil. Vehicles built before around 1990 would burn or leak enough oil to add between oil changes. Engines from 1990 to 2005 did not burn any really. It was between 2005-10 that we were told at class that oil change recommendations were being extended by the factory and that we should go along with that. No more 3000 mile intervals, 7500 or more.
So for years we went along and changed by the factory recommendation. Well, we now see a ton of vehicles using oil again. And from my experience its from stuck piston rings, not bad fuel injectors. I no longer recommend anything more than a 5000 mile oil change.
Spoke with my BG Products rep just now to refresh my memory. According to him modern low tension rings are around 8lbs compared to the old engines with 30lbs. When the rings start to stick from deposits blow by increases. PCV brings that blow by through the intake coating the valves, piston top and rings.
We have had to clean the combustion chambers of a few GDI engines recently due to deposits causing a misfire.
My 2¢