Quote:
Originally Posted by BonzoHansen
5w30 and 10w30 are the same hot, no? SAE30 is the same viscosity as a 10w30 or 5W30 at 100° C or whatever hot is. No? 5 is thinner than 10 at cold temps. At least that is my understanding.
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This.
10w30
5s30
0w30
Its all the same weight @ operating temps.
The first number is just for intitial start up. The 10 weight might be better for warmer temps while 0 or 5 would be better for warmer temps.