Synthetic motor oil thinner than regular petroleum based oil?

Question

I've just switched my vehicle over to a 10 w 30 full synthetic motor oil. I have noticed that it is thinner than the regular petroleum based 10 w 30.

Is there an online conversion chart that shows the thickness of the synthetic oil compared to the regular oil (specifically for Mobil 1 Full Synthetic)?

For example, would full synthetic 15 w 50 be more equivalent to regular 10 w 30?

Thanks!

Answer 1

No, synthetic oil is not thinner, it does, however, provide better lubricity than conventional.  A 10W-30 is rated to behave as a 10 weight oil at colder temperatures and a 30 weight at warmer temperatures.  W does not stand for winter, it means that the oil has been tested for performance at lower temperatures.  You would be well advised to continue to use whatever viscosity you have been using.  My truck calls for 5W-30, and I have been running a 5W-30 full synthetic for the past 80K miles with no troubles at all, the truck runs like a champ.  Hope this helps.

Answer 2

The thickness should be the same.  The 10 and 30 are the thick ness when the oil is hot and cold.  The W stands for winter.  If they are both 10W-30 then they should be the same thickness.  Are you comparing to the oil you drained.  That can be thicker as it is contaminated.

W does too stand for winter.  Don't spew **** out just to hear your self talk idot.

Answer 3

synthetic is thinner. if the car has a lot of miles on it  and then you switch over,,,,you may start to burn oil/