Quote:
Originally Posted by Mr_BA2003
Funny I used to think the same. I called up Mobil and suggested that the 5w-30 was too thin especially in hot weather. Was told that it doesn't matter if its 15C outside or 38C outside, the engine always runs at the same temperature. This isn't my view but Mobil tech seemed to know what he was on about.
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Yeah I never got that either. I mean I monitor oil and coolant temps a little bit, and really they don't change drastically between winter and summer.