Quote:
Originally Posted by pawoSD
The 0w40 is too thin for the diesels....it made one of our SD's noisier when we ran it on that. They like the 5w40 diesel oil much better....just use that.
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I think the 0 refers to pumping ability, if I'm not mistaken, so, like someone already said, it should still be thick enough to not notice a difference between 5. That being said, I wouldn't bother using it. If you plan on moving/traveling to mid/northern Canada, Alaska or Greenland, it might be worth the investment, but Continental U.S. and Southern Canada, you should be alright with 5 in the winter, 15 in the summer. I'd avoid 10 mostly because it seems like only the garbage brands offer it. The good ones just seem to skip it.
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1983 240D 3.0T 4-speed manual, now sold
1989 Subaru GL Wagon 5-speed Touring Edition