Yeah I know it's premium. I just put that in the title to unnecessarily get a rant going from a few

Anyway, for the uninitiated, I thought this was a pretty good high level overview of octane levels for you viewing pleasure:

 

Too bad there aren't those octanes near me. We're stuck with:
85 88 91.
Nothing else.
'Due to altitude and science...'

 

yeah 91 here too, but I might check out Shell near me - additives.

 

Do you know of theTop Tier designation?

Cheers!

 

Indeed I do and thanks for the reminder. I'll get an MRI ASAP. I use Top Tier at my local Holiday gas station where Octane is 91. I should have been more clear. I wanted to check Shell to see if their V-Power NiTRO+ was 93, but I just googled it. In MN it's 91. Not that it would make a difference.

 

and who remembers Sunoco 260?
A gallon of that + a can of Nitro Joe's in my Honda 305 Scambler, the exhaust tone changed, the exhaust smelt sweet and I think the bike was more powerful!
WJ
adding to old memories: sunoco @ .25 a gallon, 260 @ .36 and 'white gas' (unleaded) for your lawn mowers.

 

Our local sunoco was 95..

Could get certified gas with 100.

The smell was intoxicating

 

If gas gets anymore expensive I'm moving to swamp gas.

 

I use 114 octane in my drag car, but holy smackers it's expensive now. Me and some buddies usually go in on a barrel for under $500.

 

It's $2.74 here in FLORIDA

C'mon down!!!

 

Costco at Cumberland Mall in north Atlanta today:



It's advertised as Top Tier ® rated.
https://www.toptiergas.com/

It's the only gasoline I use (Premium) and have never had any problems. Why pay more?

 

I was in Terlingua, Texas last week, one gas station, next one @ 80 miles away, $4.89.9 per gallon and 'somewhat' happy to pay the price.
Good Times!
wj

 

You probably had no other choice.

 

GF said she would not help push the car.
wj

 

With that attitude, she'd be my ex-girlfriend.

 

:-). Fwiw, the very same tanker, from the very same depot, fills a number of stations here. Shell and costco and…

What’s interesting is that Shell adds about 2/3 of the additive per tank (detergents and such) that costco does.
Canadian Tire adds slightly less than shell.

 

The types and concentration of motor fuel additives depend on climate, which varies a lot in Canada, the USA, and many other countries. Frigid winter temps adversely affect fuel volatility and ease of starting an internal combustion engine.

You can Google that subject if you're interested or need a cure for insomnia ...

 

Don't shoot the messenger please but Roadkill group says it doesn't matter with the average compression ratios.

 

This is exactly the right answer, but as it is with politics, tribalism, conflict, and misinformation they sure are P-R-O-F-I-T-A-B-L-E and boy people will get rabid about their held belief, even if based on nothing really (though they will SURELY find some confirmation bias sources). Granted, I guess i am a little less "put whatever" in there, I simply stick with what the owners manual says. If I can't happen to find it, or the station may be out or something rare, I literally think nothing of just going an octane down. The question really should be - how many of you have ever had a problem related to gas octane? In my 37 years of working in, on, and around cars, I can firmly state I have only ever seen many 1..2? Racing, offroad, extreme special use, maybe. But when it comes to everything else, the only thing I know of that ever matters really is the difference between ethanol and non-ethanol. I have a 1953 Massey Harris MH50 that is my primary working tractor and it will run forever, but I Do only every put non-ethanol 87 in it. Know why? See previous comments about owners manual. And technically this isn't even right as it called for leaded gasoline, but gotta cut your losses somewhere.

 

I think Subaru Motors should have their cars run on higher octane, because they have a very high rate of blown head gaskets! I suspect their knock sensors are not adequate.