Engine flush
- Thread starter Carlos76
- Start date
I used to carry out an engine flush on my VW Group cars every year after they had reached maybe 6 years old so maybe from 40K miles onwards, but I only ever used Comma Petrol Flush which can safely be left in the engine's oil for roughly 100miles/7days - though I'm not sure what extra benefit it did,
I've always changed engine oil every 12months/8K miles(roughly) and used what should be considered good/premium oils.
For our current VW Group cars, I've not done that, dealerships did always seem quite keen to include an engine flusher dose in the service price though - what ever that means other than a bit of "upselling".
So, my advice is to just start adding a bottle of Comma Petrol Flush, if it still states that it can be left in the engine's oil system for a week's worth of running, a week before carrying out an oil change - or, if the service history shows that that car has had "good/premium" oil in it and replaced at the correct intervals from the start of its life, just add a flusher once every other year - or even not at all. (sorry a flippy floppy answer!)
Edit:- my VW dealer, cautioned me over me jumping in early and changing the oil in my 2000 VW Passat 4Motion during its first year of life! Their reason being "VW Group have had the approved engine oils designed so that they act as normal oils for the first 9 or 10 miles/ 4500 or 5000miles of use, then the oil changes its chemical structure to turn into a scrubber and clean out all the engine's internals" - this was backed up by the workshop top tech, I kept my cool and suggested that I could actually sell them the removed oil as it must now be in its prime, just ready to clean out an engine, they were not impressed.
I've always changed engine oil every 12months/8K miles(roughly) and used what should be considered good/premium oils.
For our current VW Group cars, I've not done that, dealerships did always seem quite keen to include an engine flusher dose in the service price though - what ever that means other than a bit of "upselling".
So, my advice is to just start adding a bottle of Comma Petrol Flush, if it still states that it can be left in the engine's oil system for a week's worth of running, a week before carrying out an oil change - or, if the service history shows that that car has had "good/premium" oil in it and replaced at the correct intervals from the start of its life, just add a flusher once every other year - or even not at all. (sorry a flippy floppy answer!)
Edit:- my VW dealer, cautioned me over me jumping in early and changing the oil in my 2000 VW Passat 4Motion during its first year of life! Their reason being "VW Group have had the approved engine oils designed so that they act as normal oils for the first 9 or 10 miles/ 4500 or 5000miles of use, then the oil changes its chemical structure to turn into a scrubber and clean out all the engine's internals" - this was backed up by the workshop top tech, I kept my cool and suggested that I could actually sell them the removed oil as it must now be in its prime, just ready to clean out an engine, they were not impressed.
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I don't think with modern engines and oils any engine flush is required.
I quite agree, as long as the oil and filter are changed when required.
I agree in general, hence the reason that I stated that I'm currently not doing engine flushes at oil service time, but when someone asks the question or throws that topic in for discussion etc, maybe it depends on how a car, bought used, and probably with an unknown "profile of use" and maybe even vague service history seems to look in respect of engine internal cleanliness - as either viewed from looking into the cam cover, and/or the condition of the oil that is already in that car's engine.
Then maybe, if trying to improve the engine's internal oil system cleanliness, an engine oil flusher like the one I suggested, could help.
Then maybe, if trying to improve the engine's internal oil system cleanliness, an engine oil flusher like the one I suggested, could help.
Personally dont have the issue as I probably change my oil more that the vast majority of users on here. However I have to say from what I have read (and no real world experience) with modern oils it is no longer recommended to do the flush, as I say only what i have seen and non of the VAG Specialist garages every suggest I should do it.
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