10-12-2020, 10:19 PM
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Member
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Join Date: Jun 2014
Location: SA, TX
Posts: 6,474
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With your cold winters you might want 10w40 for that time of year. Here in Texas I run 5w40 all year long. I've also run 20w50 here on very high mileage older BMWs. On newer (by model year) ones like the e53 though I am hesitant to go that thick due to valvetronics, vanos, and all their associated small oil passages.
But oils are a very contentious subject so let's see what others say.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)
2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)
2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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