Originally Posted By: CATERHAM
Ah, the master of obfuscation at work.
That's fine you can use all the cheaper to formulate low VI oils out there; someone has to use it.
By obfuscation, and in the context of previous discussions, you mean bringing facts rather then posits...
Originally Posted By: CATERHAM
BTW chasing Noack volatility is very much a mug's game. Implying an oil with a still excellent 9-10% Noack WILL thicken oil is of course nonsense. A Noack as high as 15% is low enough in most applications to prevent thickening due to evaporation of lighter fractions.
Your words, I never stated that I was chasing NOACK, just answering your question as to what parameters in the Mobil oil were better than the quoted oil.
My latest query, along the same lines of your NOACK within the envelope stance was what VI VW specify, becasue clearly, 5W30s with VI's in the 160 range are "satisfactory" to VW.
So satisfactory that while they've got actual performance parameters for all sorts of things, (yes including NOACK) that they don't even have a VI specification.
Wondering why a higher VI with more compromises in other areas would meet your definition of a superior oil, when something more middle of the envelope is a better "all rounder". Chasing VI exclusively and ignoring the other compromises in the package isn't a mug's game, it's a fool's errand.
Again, if you need a 0W" for your ambient, you need a 0W, have never argued otherwise.
Originally Posted By: CATERHAM
What's far more likely is a deterioration of the oil's cold start performance at subfreezing temp's with extended OCIs. Under such conditions going with a 0W-30 is a better bet over a 5W-30.
Under the standards the oils MAY, not DO, slip a W grade in service. As you keep telling me, the API limits are not necessarily the industry norms.
Even the 5W slipping a W grade will still be good for -30C...horses for courses, and as I stated, if you need the CCS, the choice is clearly 0W.
Originally Posted By: CATERHAM
How much lighter is PP Euro LX 0W-30 on start-up vs M1 ESP 5W-30?
25% even at 80F, 40% at 32F and progressively more at colder temp's.
If you want to maximize fuel economy this would be the oil of choice. Pennzoil claims a 3% fuel economy gain in the VW PV1451 test.
Still stuck on that start-up versus warmup thing eh ?
SOPUS claim 1.7 for the 5W30 ECT. As you keep telling me, the allowable test limit is not the industry norm (e.g. TEOST being higher on 0W20 due to pressure from the Japanese OEMs)...the average user is going to see nothing between the high VI 0W30 versus ECT 5W30...clearly a difference in a test sequence, next to nothing in actuality.
