Current Fuel (Gasoline and Diesel) Prices in Mexico
Gasoline and diesel fuel Increase a few centavos a month in Mexico
Gasoline and diesel prices in Mexico will continue to increase slightly every month in 2013. Fuel prices are supposed to increase a few centavos a month, however by the end of 2011 Mexican fuel prices can float like everywhere else. Diesel in particular (which used to be cheap) is no longer subsidized.
Mexican fuel prices increase around the 10th to the 12th of each month. Overall, the cost of gasoline is less than in many states in the USA. Diesel often costs less in Mexico than in many parts of the USA. 
Whether Mexico will allow the price at the pump to float with rising oil prices is anyone's guess. There is talk once again of selling Pemex to private investors in 2013. Cheap gas and diesel in Mexico used to be kept artificially low to keep people from being too dissatisfied with their government. Gas stations, however, are independent franchises. There were 9,600 gas stations in Mexico as of 2011. Hundreds have been built since.
Before you look at the fuel prices and go away, please browse this site.
I can plan a driving trip for you, help you move to Mexico, or sell you some of my handmade maps and road logs that will help you explore Mexico as well as choose the safest driving routes. Please see what I have to offer (opens in new window). OK the commercial is over, back to your show.
Fuel costs (unleaded gasoline, UBA, diesel or low-sulfur diesel) in Mexico are still less than in the USA. Gas and diesel fuel prices are quoted both in Mexican pesos and in US and Canadian dollars.
For current (mostly) fuel costs in Mexico, see the Mexican fuel price page. I try to update it once a month, which is all it needs. But I am often remiss. The price changes are not significant, but a few centavos per liter per month. Unless you are buying a consultation, please don't write to ask me the current price of fuel. It will be on the site if I know. Thank you.
When US gas prices fluctuated a few years ago, Mexican gas and diesel prices stayed stable.
There is only unleaded gasoline (Magna - regular and Premium UBA - super gasoline) in Mexico
today. Magna is 87 octane. Premium gas is not only higher octane (91) but lower in sulfur (15 ppm).
I have not gotten a straight story from Pemex or from the few gas station owners I know. But a reliable source in Mexico City to me that there is ultra low sulfur diesel (DUBA-- 15 ppm) and low sulfur Mexican diesel fuel (LSD [seriously]-- 30 ppm, depending on what state you are in. But all diesel is called low sulfur - you won't see anyone touting Diesel Ultra Bajo Azufre.
As of February, 2013 there still is not any ultra-low-sulfur diesel outside a limited area around Mexico City and Mexico state.
In January, 2010 ultra low-sulfur diesel (DUBA) was introduced that has only 15 ppm of sulfur. It has 5% biodiesel so it has more lubricity. We all know that is a good thing. It was introduced to 50% of the Pemex stations in central Mexico (Mexico City, Morelos, Puebla, Mexico and others). Supposedly it is being slowly introduced to a few stations in the rest of the country. Look for the sign, "bajo azufre" below the word "Diesel" on the gas station signage. But I have to be honest with you - don't count on finding ultra low-sulfur diesel in Mexico. If you are afraid of putting plain low sulfur diesel in your tank, then don't drive to Mexico with your diesel vehicle.
I do not drive a diesel vehicle, but have read blogs by those who do who say that they have driven a couple of thousand miles on the "regular" diesel in their newer RVs requiring ultra low sulfur diesel with no ill consequences. However, the site fueleconomy.org says that LSD will make your engine hallucinate. At least they sternly say not to just say no if you have a 2007 or later vehicle.
Baja supposedly has low sulfur diesel (not everywhere, though). Talk to a competent diesel mechanic about the effects of using fuel with higher sulfur content on your engine before deciding to drive a newer (2007 and up) diesel vehicle to Mexico.
It it a waste of money to buy Premium gasoline in Mexico if your vehicle uses regular gas in the USA. Ditto for the aditivos (additives) that gas jocks try to sell you. Fuel injector cleaner MAY be somewhat valuable. I used to use it all the time, but today, seldom bother.
For monthly updated gasoline and diesel prices in Mexico, see the Mexican fuel price page.
I've seen some RV bloggers suggest you drive over the Mexican border to fill up with diesel. Driving across the Mexican border just to fill up and driving back to the States is false economy, since you must have Mexican RV or auto insurance and will have to wait an hour or more in line at the Mexican border. Plus you need a passport to reenter the USA.
However, both gasoline and diesel costs vary by regions of Mexico. This is a little-known (as heard on the TV show Cheers) fact and likely to lead to different people swearing that the cost of gas or diesel is different than someone else. Heck, I used to think the price was the same all over Mexico except for the border area and Mexico City. The Mexican gas and diesel prices on the next page are based on the cost of unleaded and high octane gasoline and diesel in the majority of Mexico.
In the Northern border regions of Mexico (Tamaulipas, Chihuahua, Sonora) fuel costs more than in the interior of Mexico. The southern border, Chetumal, Q. Roo seems to be the least expensive. Metropolitan areas like Mexico City, Cuatla, Cuernavaca, Iguala, Pachuca, Queretaro, Toluca, Tula and the whole Valley of Mexico have the second-least expensive fuel costs in Mexico. To further complicate the cost of fuel situation, states with an 11% tax (Sonora, Baja California, Baja California Sur and Quintana Roo) have a slightly different pricing structure.
For fuel costs in Mexico, see the Mexican fuel price page.
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