It is time to have the engine oil for my adventure changed. I usually take it to the 'casa' to have it serviced. But this time I am thinking of not taking it to the 'casa' for financial reasons.

I worked for a company that gives petron fleet cards as one of their benefits. I have decided to use said fleet card to buy the oil from a petron station and to have the car serviced there.

Now I'm thinking of getting Ultron Race which is the fully synthetic product that petron has. I've done some researched and learned that Ultron Race is SAE 5W-40 grade.

In the car manual, the recommended is SAE 10W-30 or SAE 20W-40. If I understand it correctly, the number that I should be concern about is the second number which is 30 and 40 because we live in a very hot climate.

Will it be a problem if I use Ultron Race for my car?

Can someone give me some insights?