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Discussion Starter #1
hi
would anyone recommend doing a engine flush when doing oil change in gqv.also thinking of cleaning maf as have bmc filter fitted and think could have oil contamination
 

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hi good question I am thinking oil change on my QV in next few weeks is it advisable to do an oil
flush treatment ? sound s like a good idea to to do it to keep oil passages clear especially the turbo supply
pipe. but will it affect the variable valve timming mechanisms etc some advice appreciated
 

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come on people wakey wakey
Ok wakey wakey !.... in my humble opinion engine oil flushes have been a thing of the past for decades now. Modern oils are designed to clean as they lubricate, hence the filthy black colour when drained, the carbon is usually suspended in the oil. That's my tuppenceworth, sorry it may be heresy and many, yet to post, will disagree. :teacher: Just keep the oil changes frequent and of the correct type.
 

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Engine flush probably has a great profit margin for the garage?
Would the residue of it contaminate the new oil?
There, I'm awake!
 

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I wouldn't bother.

Just get it nice and hot before you drain it (not suck it from the dipstick tube) and change it along with the filter at least every 10,000 miles.
 

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Discussion Starter #7
sorry to wake you all i know its Monday.car goes in Wednesday so needed a little sage advice although I feel the jury is out on this subject having googlised it for an hour.may just blast some wynns in as I have can and seems to work well for some as it has no lingering nasties
 

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Discussion Starter #8
I was wondering on left over residue too cue2 but maybe this is taken into account by manufacturers of good flushes I hope
 

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hi
would anyone recommend doing a engine flush when doing oil change in gqv.also thinking of cleaning maf as have bmc filter fitted and think could have oil contamination


If you're using Selenia 5W-40, that wouldn't be a bad thing to do :).
 

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Because Selenia isn't a great oil and leaves deposits in the engine.
 

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Exactly. 0W-30 is OK, though.
 

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After finding very small soft black particles when using Selena back in 2013 and just getting the heads up on the forum of a change in oil spec for the QV (not sure about other G's in the engine range) I asked the dealer about this. Their reply was we just use the oil spec chart used for all cars/makes and use what this advises. We had the oil checked to confirm the visual appearance.

So I used a fairly local specialist performance garage (Integrale tuners, etc in North Yorkshire). 10 out of 10 service by the way.
They did the oil/filter change after only a few hundred miles from getting the Selena, this old oil was more like a diesels in appearance. Since the specialist garage put Fuchs Racing oil in I've had no oil degradation (all checks green status after oil condition monitoring checks) and the oil appearance is as it should be since.
We have always done intermediate oil/filter changes, but wonder how much un-nessassary engine wear the original oil has done!
 
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