Moderator: volvite
That is what I was thinking but needed a 2nd opinion.smj999smj wrote: ↑Mon Jan 25, 2021 3:24 amLook at what's on the inside of the gas filler cover. If it says that premium is recommended for maximum performance, than you can use 87 octane. If it say premium fuel is "required," then use premium fuel. That said, in my experience, VQ and VK engines tend to run a little smoother on premium.
You're correct; there is no "mid-grade" tank in the ground. The "mid-grade" is made by a combination of the two at the pump. In the mid-80s when Sunoco Ultra Premium made its debut and was the highest octane available on the street (costing a "whopping" $1.32/gallon!), I was working for a Sunoco station and we had three tanks: one for regular leaded, one for unleaded "economy" and one for Ultra unleaded. The regular leaded had it's own pump. The unleaded grades were all pulled from the two, unleaded tanks in the ground.silverarrow27 wrote: ↑Tue Feb 09, 2021 1:24 amI knew a general manager of a local gas station. She said mid-grade, 89, is just a mixture of 87 & 91. There's is no mid-grade tank underground. Nonetheless, I've always done 91 octane on any car that recommends it, one of those things where you'll never know when you need that extra performance.