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.
Found this strange. I'm sticking to the 10w-40. Running LPG the 5w-30 would especially not be recommended.
When the Shell 10w-40 goes on sale everyone grabs them all before I have time to get in and grab some!
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He is correct. Remembering of course M1 5W30 is a pretty thin 30W formulated more to the 20W end of the viscosity range for a 30W