what viscosity would you recommend looking at there data for euro castrols 0-20 LL-17 vs there 5-40
Eco mode=transmission is too aggressive. It is very rare, but there were some instances of LSPI. Same is with VW EA888. Very rare, but happened.
As noted, the grade is the key. Actually the HT/HS but grade will do.
Again, these engines use LL01, LL01FE, LL04.
Honestly, I'm not too gamiliar with your particular platform, but am with Euro stuff.
Designed to allow for 20w not only 20w. It's hard for people to wrap their heads around how an engine can use such a wide range of viscosities.
i took it to the drags once just to see what the lil 4 cyl would do i mostly baby it, i use it as a grocery getter get around the town bc of the fuel economy i drive it eco 90% of the time and sprinted the rest. MG flasher lets you can change tunes on the fly so you can leave it stock or stage 2 with different fuel trims on the fly
how bad will fuel economy suffer going from 0-20 to a higher grade like 0-40, 5-40 or 5-30 right now i get 27-28mpg with 80% city driving
Not much probably. I’d just go with ESP 5W-30. I don’t think B46 suffers from any kind of oil adjacent issue like rod bearings in earlier engines. Every teardown I’ve seen on the forums of a B engine with the coated bearings has looked good.
1-2 mpg. It may not matter to the individual owner but for an automaker who sells tens of thousands of cars it adds up.
1-2mpg I think is extreme. I'd say up to .5mpg on a bad day.
That sounds like a great plan. I would keep the 5-30 in there year round, no need to fuss with changing grades for the winter.
Cut it out.
Actually I've found published range of .9 - 2.2 mpg. Regardless if it weren't significant then automakers wouldn't be going thinner and the oil industry wouldn't have FE bench tests.
Actually, B38/46/48/58 are modular engines. They are purposely developed like that to cut the cost.
That I did not know. Thanks for that info. Still, drawing comparisons to a power dense jz and b58/48 and saying that it would require same oil just because it's modular, is silly.
It’s HIGHLY doubtful that one would see anywhere near an impact of 2mpg by moving to a Xw40 vs a Xw20 in any application. I had a handful of OCIs in my old Odyssey on Xw20s over about 20k miles. I then switched to Pennzoil Euro 0w40 for about another 20k miles before I sold it, and saw only a 0.6mpg difference between the two over those cumulative distances. Considering I also installed the VCMuzzler around the same time as the switch to 0w40 which disabled the “eco” mode, there was literally NO measurable difference between the two at operating temps based on viscosity alone.
