All Things Mk5 > Mk5 General Area
Which 5W40 oil to buy?
OllieVRS:
--- Quote from: ROH ECHT on April 09, 2023, 04:46:19 pm ---
--- Quote from: OllieVRS on April 06, 2023, 02:58:54 pm ---Thanks for all the replies!
I like that boil and cold test that you posted
But the common consensus is that I should dump the €91 Miller's as soon as the track day is over, right?
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Right....race oil is not meant for running normal to long intervals. Any "Race" oil you use is probably not going to be factory approved...but will likely protect better under track conditions and use.
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Just posted in my other thread https://www.mk5golfgti.co.uk/forum/index.php/topic,133432.0.html about how the oil performed. Spoiler, I'm a bit disappointed, considering what it cost. Or maybe I just expected a little too much. I dunno :stupid:
But I have a bottle of Mobil 1 5W40 ready to put in, just need to get a new filter.
ROH ECHT:
I commented on that post just now...to point out that engine oils today are known to evaporate and lose between 5% and 13% depending upon the brand, etc..
So, from 5L, you can expect a loss of 0.25L to 0.65L by the time an oil has completed its evaporation *caused by heat.* Obviously, the variation is determined by: brand, type, grade, etc..
pudding:
And heat, so maybe an external oil cooler might be a useful mod for track work.
ROH ECHT:
--- Quote from: Pudding on April 11, 2023, 04:36:50 pm ---And heat, so maybe an external oil cooler might be a useful mod for track work.
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LOL... :happy2:
I see I forgot to add "heat" as being the main cause of evaporation. I assumed "heat" was a given.
OllieVRS:
If if I were doing more track days I would definitely look into an oil cooler, good suggestion. Doubt I'll have the confidence to go back though after yesterday :grin:
But speaking of oil coolers, what are the symptoms of one failing?
@ROH ECHT you seem to know a lot about oils. Running my Miller's for 3100 miles resulted in a loss of 0.7L, the best oil consumption my car's ever had during my ownership. Are you suggesting it may have been even better in reality, since 0.25 to 0.65 evaporates anyway?
Thanks :happy2:
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