Interesting. Thank you for your input....I had a similar occurrence with my Mkv GLI Autobahn, that got totaled, with the old EA113 Bpy belt-drive engine, except it was 0w30 mixed in with 5w40 Edge after I heard bearing noise from the turbo on the 5w40 alone. Not only did the excessive noise...
Supposed to state conventional. Spell-check. Euro blends are formulated to be a little thicker under better emissions standards concerning additive packs or lower noack ratings. They might stay in grade better because of their bases or unique additives. They're good makeshift high-mileage oils?
Good cars, Toyotas. Family member's Scion TC has 267,000 miles on it running convention or semi synthetic 5w30 and it burns only 1/8th a quart, checked at the end of an interval; something thinner then alot of Euro blend 5w30 or 0w oils.
My mistake.
Why do people rely on UOAs to conclude an oil is bad if it shows a lower viscosity index at the end of its interval; "it sheared excessively."
Also, how much of your 0w40 Castrol is consumed vs other oils including the dealership castrol?
I rely off the oil-manufacturer data sheets, both the Tdss' Msds for each oil concerning base stocks and additive packs, Thank you. Although the values at the bottom of each UOA detail viscosity indexs after each sample taken from an interval, they aren't the most accurate or precise; but they...
I also noted that in some Used oil analysis' that 5w40s or 5w(s) of lesser quality base stocks and higher noack ratings sheared to light 30 weights in European engines or any engine causing fuel dilution from direct injection and resultingly be consumed at a faster rate, surprisingly when...
So comparing 0w40 oils with 5w40 oils, or any 0w or 5w oil for the matter, it would seem the 5w40, 5w(s) in general, aren't consumed or burned off as easily as 0w oils due to overall hths or thickness; but 0w oils might have superior base stocks and lower Noack ratings to compensate. I observed...
overall. i,d say its good for all intensive purposes... castrol and mobil 1 0w40 both get decent uoas depending upon circumstance...0w40 with mobil 1 synthetic 15w50 was a good idea btw!!!referencing previous post on this thread!!!
look at previous comment...there should be good Uoas for Bc castrol too...formulations would have to be similar in order for it to perform as well as it does.
love you guys...thanks for taking the time to share your experiences...i still have research to do...if i am not mistaken... bc 0w40 is the same as german castrol 0w40...so...here it goes...the Fuley plant..owned by Ineos oligomers, is the largest oliphen blending plant in the world responsible...
Given the countless uoas done to verify that Castrol 0w40 is in fact a decent brand name oil, often pruchased at Walmart (the irony). How well is this oil able to resist burnoff. I have tested it in my previous Mk5 GLI and found it, alongside 0w30 GC to be around the same resistance to the 5w40s...