It can be very hard for a person with a fast metabolism to gain body weight. For these individuals, even a few pounds can make the difference. Doctors say that having too low body weight can cause health issues like organ damage, lack of menstruation in women, and bone density loss to name a few.
Confusing as it may be, dexos is not a brand or type of oil at all. Instead, dexos is a specification concocted by General Motors along with a license the auto maker sells to oil manufacturers. Oil specifications are nothing new.
So, in those cases, if you go with a dexos 1 licensed 5w30 oil in a vehicle that calls for 5w20 or 0w20, you could cause yourself problems-even if only when dealing with service centers that will balk at your choice of viscosity. It's of little consequence, though.