150,000 miles on AGU, swap from 5/40 fully synth to 10/40 semi?

[The Dave]

As title really. The engine isn't particularly noisy or anything, but maybe it's my paranoia kicking in, its a little bit more tappetty than it once was. I change the oil every 5/6k and usually use 5w/40 fully synth quantum platinum.

Due to it's age (1999) and milage (150k just about to turn) would people recommend running the decent 10w/40 semi synth quantum stuff? To be fair the old owner used to run that and change it every 5k... but wondering if 1) it'll be better for the engine due to miles and 2) make it quieter?

I'd of course keep up the changes every 5 or 6k

Thanks guys.

[Wayne]

Has it had the pick up pipe replaced.

I would stick with 5/40 fully synth.

[The Dave]

I have no documentation to say it has been done, so it's something I've considered doing.

Truth be told I want to sell the car and buy a civic type R but it is due an oil change, and unfortunately (for me) needs 2 front tyres also... I've always looked after it and don't want to stop just because I want to sell it for something newer

Ballache that the prices for MK4's have dropped so dramatically low now mind!

[AudiA8Quattro]

Does it use any oil as in burn it?
If not you would be ok to stick with synthetic.
If it were me, i would probably use 10w40 in it.

[The Dave]

It isn't using any excessively, just normal enough I guess, perhaps a little more than it used to use. I don't have any leaks though nor smoking etc. But she is getting on a bit now miles wise.

[G0LF_GT1_TURB0]

sorry to jump in, but 'The Dave' you aren't the guy who used to own a red corsa B 1.6 sport by any chance? T51FNN? 

[carlitto7]

Go with the 10/40 quantum semi syn oil a VW tech told me after 100,000mls use this grade of oil.

[mcgee9t2]

try it out, see if its any quieter.

cant see it doing any damage?

[+49]

Why would you stop using Full syn?

This old story of when an engine gets to a certain milage just stiff some thicker semi in to shut it up is a bit silly and doesn't solve any problems.

Running Fully Syn oil has its benifits to the engine regardless of age/milage (of course classic cars are differnt)

Keep running fully dude!

[The Dave]

I suppose I'd feel better knowing quality oil is in there, true... it's not that noisy anyways, I'm just paranoid, I look after all my motors and just want them to sound healthy

G0LF_GT1_TURB0:



Yes