CNN Says more are buying primo gas and paying much more for it

And it's usually pointless.

 

you can't argue with stupid

 

Modern ECU, fuel injected motors will automatically adjust to burn lower grades of fuel. You just won't get the performance numbers advertised in their brochures.

I know for a few model years; VW's had an octane sensor that would trip the CEL if you didn't fill certain model cars with premium fuel.

 

My Prius was set up to run on 87, my ZR1 was set up to run on 93 "minimum", but I run 104 when I really want to play. I don't need "anyone" to tell me what I need...or want.

 

Considered this prior to using 89 oct in the 5G -- after all, it's designed to run on 87.

'Run' and 'get best mpg for my driving conditions', aren't and will never be the same tho. As above, modern ECUs have been using lambda to adjust to octane at least 30y now (those vehicles with wideband sensors as current state-of-art, will be much more accurate as well).

No debate tho, 5G gets better mileage on 89. Have tried both a few tanks, proof enough for me.

But 93 in a Prius? Spend the savings on an electric bike, for the < 3-mi honey-do runs that can ruin a Prius' ICE.

Of note: since using 89 in the Prius exclusively, have not seen too much of that exhaust-blowby-caused, highly-acidic water accumulation in the pan on swaps. Could be due to swapping every 3500 mi rather than the manual's reccies (which AMD from Car Care Nut YT channel's repeated said, is the source of those Toyota which never make it even close to 100K). Seven oil / filter changes in 70K mi, are you f***ing insane? Just the filter itself would be fully-bypassing long before 10K, pumping unfiltered oil through the myriad tiny passages depending on crystal-clean oil in them, in modern ICEs.

Change your oil -- esp in an HEV which rarely makes it to the same op temps an ICE-only burns off water in pan with all that wasted consumption, easily.