Exactly. The same reason you see vehicles here that people track bump up to 40 and 50 weights while they're tracking. For example, a 350Z takes what, 5w30? But nobody taking it on the track for the weekend (let me rephrase, nobody knowing what they're doing) is gonna run 5w30 for track time, theyll bump it to a 40 or 50 weight.
Originally Posted by Jimmy_Russells
Because Autobahn. Nobody ever seems to talk about this, but nowhere in North America can you maintain 120 mph for two hours, for example. On the Autobahn, save for having to slow to 80 mph sometimes, you can do that no problem. So they have to recommend oils that will not thin out at 240+ degree oil temps.
Originally Posted by Navi
If there is absolutely zero issues with 5W30 then how come in Europe we see 5W40 and 0W40? If I go on the Mobil 1 website and start plugging in various model names from Audi and MB how come it tells me to use 5W40?