SonyAD
banned Borat
You didn't include the qualifier:silverbox said:Sony, I take issue with your definitive statement "Only the very best 5w40 synthetics and the exceptional 0w40 synthetics provide a normal engine enough protection".
There are quite a few examples of Xw30 oil providing adequate protection on 1.9 and 2.0 TDI's. Check the Used Oil Analysis Database on this forum.
A good example is Total Ineo Mc3. Also Member Indego Blue Wagon Had great results going 20,000mi with Elf Full Tech.
These are both PAO Synthetic oils which may have had something to do with the good results.
Only the very best 5w40 synthetics and the exceptional 0w40 synthetics provide a normal engine enough protection (film strength and film thickness) in a HTHS environment. I don't think a 30 weight would cut it in my engine if I'm pushing 115 ~ 120°C oil temperature (at the sensor).
What is the HTHS viscosity of those w30 oils? Simply not enough. I remember reading somewhere that VW mandates a HTHS 3.5 or 3.6 (can't remember exactly) centipoise. That likely excludes any w30 oil from the get go.
Also, there are tolerances associated with any and all of an oil's specifications. Even if the Technical Data Sheet states a HTHS viscosity of 3.5 centipoise, it isn't necessarily exactly 3.5 in any and all jugs of that oil you might find at Walmart or wherever. There will be fluctuations. And 3.5 is already borderline or bellow, per what I've read.
I also use a PAO synthetic (supposedly fortified with group V polyol esters, at least that's what I read somewhere, either here or on BITOG - don't remember). Only it's a 5w40. And I'm not sure it would be enough to save the engine in the event of a HTHS situation.
I would love to see an 0w40 that leisurely ensures enough HTHS viscosity with shear down safety margins on top that don't get eaten through during the OCI. So far, only the John Deere Plus-50™, mentioned in another thread, fits the bill. But I'd like to see other people test on their own dime how well it stays in grade (doesn't shear down) before I bestow my "Sony's Oil of Choice" award on it.
Because anyone can just pour viscosity index improvers into a thin base stock. Not everyone can make an 0w40 oil with excellent VI / proper HTHS viscosity that neither shears down between oil changes.
No ACEA A1, A2, A5, B1, B2, B5 for me, thank you. I'll stick to oil that's thicker than cowpiss when push comes to shove.
Yes but the camfer makes it easier for oil to get out of the way of the advancing cam.T_D_I_POWER said:It's a stress reliever. Radius and and chamfer corners have less stress than sharp ones.
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