Oil in purto vallarta

tepetapan: Mexico is a big country with temps from freezing to over 100 degrees. A blanket statement about that 5w oil may not be correct. If one lives in Phoenix 5W30 is what your dealer would install. So if you are in Maz or PV or anywhere North of that the same weight would apply. 15 year ago I would have agreed with you but modern engines have changed. I use whatever my mfr. suggests. Some will have a chart showing both 5w30 and 10W30 depending on the temps you encounter. I would suggest you find a better link than Amsoil. Mostly hype and some of their lubricants do not meet mfrs. requirements. If you go to Penzoil there is an oil selector. I plugged in Mexico as the country and a 2012 Silverado with a 5.3. They suggested 5W30 for both Mexico and the USA.

Moisheh