When I bought my '80 MB 300SD I did an oil chamge with 15w40 Rotella. The first day it dropped below 35* it struggled to start. Below 25* it needed a few hours of block heater time. I changed it out to 5w40 Rotella T synth and 6 years later I've still never plugged it in, even in -10*F.
I'm trying Edge 5w-30 in my 2.0T TSI for a short run this winter. Shouldn't be in long enough to thin from fuel dillution. It seemed to work great in this 1.8t...
From my experience, the 2.0T uses very little oil the first 5000 miles or so, and then starts using about a quart every 2000 miles or so until I change it. Note that I've had the best experience with Mobil1 0w40 and Castrol 5w40. When I use Castrol 0w30 European Blend, it tends to boil off fairly quickly. I haven't tried other oils yet.
So far, though, it appears that engine wear and presence of contaminants, as shown by UOAs, are significantly "better" with Rotella T in my car's engine than they were with any other oil I used, and especially Castrol Syntec 5W-40.
I was running Motul 8100 and got tired of having to pay alot of money and get it shipped, so I did alot of research and found that overall, the Rotella is one of the best oils for the price, so I switched to that. I notice no difference in power, and it costs alot less
OK, then what works for me is Castrol Syntec 0w30 European Car Formula.
i drive a 95 jetta vr6 i currently running mobil 1 10w-40 but i been hearing alot of good things about this new castrol edge thinking about switching to the 5w-40....im hoping i feel a difference
i run 20/50 Castrol year round. it actually reduced the burning and smoking of oil on start up, unlike Mobil 1. i'm glad i switched over.
And I use a 15W40 diesel oil year round here in the Bay Area, currently Rotella-T, but have used Mobil Delvac 1300, Delo and others.
It seems 15w-40 is the standard diesel weight. I bought Castrol last time because it was on a good promo sale.... 5 quarts and filter for $5 (after rebate).
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