I live near the southern border. A lot of 'migrants' want to come here for free medical and other government assistance, on your dime sir.
I don't trust the cheap stuff like Supertech...$6/liter delivered for Prime members. I run it in a 727 and 2 46RH.
https://www.amazon.com/gp/product/B00HN4GTQK/?tag=joeychgo-20
If you're not a Prime member, take a basket-weaving class at your local college and get the membership for half price. After the class ends, it seems they leave you on student status.