Thanks for the heads up. I will stick with she'll then as that is what I run in my 2010 Maxima and have never had any issues. I've never used the Petro Can's much but I have heard bad things about their fuel. Do you know much about Centex fuel? I believe they carry 91 and they drop their fuel prices every other day of the week it seems. It would be a nice option as I have found the car to be a bit thirsty so far, but that also might be my driving habits with the power of the car lol.
I'd stay away from Centex, I don't use their stations myself but I've heard nothing good about them. They had some bad fuel in one of their Alberta locations due to poor construction of a fuel tank two years ago and it ended up causing major issues for hundreds of people who filled up at that location. There is some pretty rigorous testing, validation and inspections for those Storage tanks so it's likely
they cut corners to get a new tank installed.
Not to mention they are a independent which means they buy surplus or bottom of the barrel product that just makes minimum standards. And while modern fuel is pretty good
compared to 10-15 years ago you never know what blend of fuel/additives are going into your tank.
Some locations are fine such as Costco but the wait in line can be brutal, but they at least buy from only a small handful of top-tier suppliers.
CO-OP Fuel is also decent if you are in a pinch as they own their own refinery, but they cost the same as Shell more often than not so no real benefit there.
Personally I'd stick with Shell 91 as the Infiniti manual recommends you stay away from aftermarket additives, Eth blends and octane boosters.
If you want to try a Octane booster just make sure it doesn't contain MMT (methylcyclopentadienyl manganese tricarbonyl) as Infiniti advises against
that in the manual.
can get into the nitty gritty of chemical composition of additives if you really want to learn more.