Since I'm going to change to a Dexron VI fluid from the Mercon V that I've been using, I had to do my research first. Ever wonder where the name Dexron came from, well ...... I wanted to get the Dexron VI standard, but since it's $30 or more, I'm going to bypass that step. As near I can tell, to meet the standard the fluid with have to be at least a synthetic blend. Some products say they are Full Synthetic. You will also notice that many fluids will use in their name "Multi Vehicle", I believe this is a way to get around paying GM to licenses their products as Dexron VI. It usually means that the price will be less when the company does not have to pay for the license. See Mobil 1 image below. You will notice that Mobil 1 Data Sheet says it works for all Dexron specs, except the VI version. According to Exxon Mobil, Mobil 1 Synthetic ATF is of the following quality level: Allison C-4 General Motors Dexron IIIH General Motors Dexron IIIG General Motors Dexron IIE General Motors Dexron IID General Motors Dexron II General Motors Dexron Ford Mercon MAN 339 V1 Volvo 97340 Volvo 97341 Below are the ATF fluids that I was able to get their data sheets for, including a John Deere Hy Gard hydraulic fluid that some people use because it's much cheaper to purchase. I was MOST INTERESTED in the parameter called "Flash Point", this may not be the perfect indication for oxidation of the ATF, but it's best that the companies publish. Another words, the higher the flash point, the higher temp the fluid can go before you get that BURNT smell. Also on my list was a Full Synthetic and Valvoline in my opinion was the best. It was a full synthetic and had a Flash Point above 400°F. I also got the best price for Valvoline on Summit when purchasing a case of 12, so I bought two cases at $7.17 per quart, some were over $12/qt. https://www.summitracing.com/parts/vlv-vv370-12 . .