I feel dumb now. So that is what the w means, & I wouldnt need it in Puerto Rico. Why would they eaven sell those here?
They sell it there because the distributors sell oil in massive volumes and the 10W30 blend is the most common. The straight grade oils like 30 weight or 40 weight are not as common and are sold in smaller volumes so there is not as much profit in it for them.
It'* all about money.
I have had many discussions with Exxon reps and they believe the 0W30 or 0W40 blends to be superior for really cold climates.
I use straight 30 weight in my lawnmower. With less additives and a simpler molecular composition, it will be stable longer requiring less frequent changes and offer better protection.