Background: I have a 2007 Subaru 2.5 turbo. Once upon a time I used Mobil 1, but would sneak in some 0w40 with the requisite 5w30 until my extended 100K warranty expired. Since then I've been using Castrol Euro 3w30 (mostly the Belgium version). I was obsessed with keeping the 100C viscosity above 10 (or 11), without overdoing it (5w40). Also obsessed with HTHS. The Castrol (SL, A3B4, HTHS 3.5) was well regarded for older vehicles has worked well, IMHO, confirmed by a couple UOA's. My supply is now sketchy, and my cache stash is near gone (4 qts...less than 4.25 recommended fill...I would usually fill 4.5, and forgettaboutit for 3000 miles. Those BS UOA's looked good to me.
I happened to be in a Walmart (in TX) yesterday and saw this: Castrol Euro 5w30 SL (same approvals I think, including BMW LL1, MB & VW). Made in Austria. L
What is this stuff??? Its only $23 per 5qt jug, as is most Castrol Edge here. Including 0w40 Euro.
The 0w30 SL vs 0w40 SN has been discussed ad nauseum. But where does the Euro A3B4 SL 5w30 fit? I searched Castrol docs and found this: looks like total group3, but i don't know what latest 0w30 (Euro) is, nor the 0w40.
4 quarts of 0w30 stash Belgium Castrol + 5 qts of new 0w40 = 2 oil changes.
Soooo: Which would be better to use, or even "blend" with the stash: e.g. 2 qts 0w30 Belgium + 2.5 qts new oil? I'm thinking the 0w40 is the better choice. Or does the "all oil today is fantastic" argument hold
I happened to be in a Walmart (in TX) yesterday and saw this: Castrol Euro 5w30 SL (same approvals I think, including BMW LL1, MB & VW). Made in Austria. L
What is this stuff??? Its only $23 per 5qt jug, as is most Castrol Edge here. Including 0w40 Euro.
The 0w30 SL vs 0w40 SN has been discussed ad nauseum. But where does the Euro A3B4 SL 5w30 fit? I searched Castrol docs and found this: looks like total group3, but i don't know what latest 0w30 (Euro) is, nor the 0w40.
4 quarts of 0w30 stash Belgium Castrol + 5 qts of new 0w40 = 2 oil changes.
Soooo: Which would be better to use, or even "blend" with the stash: e.g. 2 qts 0w30 Belgium + 2.5 qts new oil? I'm thinking the 0w40 is the better choice. Or does the "all oil today is fantastic" argument hold
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