All Things Mk5 > Mk5 General Area
Which 5W40 oil to buy?
ROH ECHT:
The clackity sound at startup may be due to the gooeyness of Millers...stay tuned. I would stay away from using Millers for the duration of an interval used on a daily. You might consider Millers for a trip to the track and then drain it for your normal VW 502.00 approved oil. I use Liquimoly Molygen 5w40, although Mobil 1 is slightly better against friction in a test. Millers responded to someone and said "there's is more of a race oil and should not be used in a daily...it is not VW 502.00 approved. Millers does provide good protection against friction, but it isn't meant for longer intervals or even for 5k mile intervals." Also...Millers, in a test where Millers and Pennzoil were heated and then cooled, can get a bit gooey. This is a pic of a cold pour test performed with both oils new poured beside themselves after heating and poured when chilled;
mjmallia:
--- Quote from: OllieVRS on April 05, 2023, 04:20:56 pm ---On a side note - is it normal to here a clackity sound for ~1 second when starting the engine from cold? Sounds like the cam chain not having pressure momentarily, but can't be sure. Or maybe it's the Miller's :scared:
--- End quote ---
My wife's Golf Mk5 does this most of the time and has done for years, but my Mk5 GTI has never had a single clatter on start up........but I do oil changes every 3 to 6 months and the wife's once a year :evilgrin:
pudding:
Yeah mine used to clackety clack for a second or two for years, but only when really cold or if left for a week. To me it just sounded like a couple of tired tappets taking a while to re-pressurise.
pudding:
For track work, I would use an ester oil without nano bits in it. I'm really not convinced by that stuff. Engines have managed fine for a century without bits in the oil, and modern engines picky with their fluids.
Fuchs Titan Pro S is a great oil and good for daily use as well, although it's not VW approved.
Motul 300V is another good one, but again, not VAG approved as they're both classed as racing oils.
OllieVRS:
Thanks for all the replies!
I like that boil and cold test that you posted @ROH ECHT , it gives quite an interesting insight. Pouring out the Miller's with 3k miles on it, seems as viscous as any other used oil that's come out of there, bar the 5W30 that was originally in the car when I got it. Thankfully Ireland rarely goes below freezing temperatures so the cold use of it isn't something I'm worried about, especially considering this is pretty much gonna be my oil for the whole summer.
But the common consensus is that I should dump the €91 Miller's as soon as the track day is over, right?
EDIT: This is the right Mobil 1 you mentioned earlier, @Pudding ? https://www.halfords.ie/motoring/engine-oils-fluids/engine-oil/mobil-1-fully-synthetic-0w40-engine-oil-5l-390633.html
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