Living in the North East, LI. NY specifically, there is seasonal gas being shipped to all the stations, probably explains the lower mileage per tankful in the fall/winter months. Spring time the numbers jump up dramatically per tank.
87 octane/Regular is all I need, spending $$ on premium is just wasted $$. Detergents/additives are in all grades, octane # is only important/ required for higher compression engines typically in sports oriented cars. Computers usually detune the engine if it sees early detonation. My new ‘88 Honda Accord 4cyl req 87 octane but in the summer months w/ the AC on it started pinging like castanets, the dealer said looks like you’ll need to go up one grade from ‘87. Nice !
It’s my opinion this ethanol blending for many years now is a scam and the latest new green deal philosophy put out by the EPA are screwing us royally. Reminds me of the first generation of catalytic converters that GM used on the Chevy Camaro’s, ‘78 Z/28- huge, heavy and very inefficient wasters of fuel, that hinder performance in the name of clean air. That was all BS too, as a performance oriented hot rodder I removed all emissions devices and when inspection time came the car was put thru it’s scans, the tail pipe sniffer etc, I had all my print outs saying I was well under the mandated limits that were required in NYS. Bottom line, I had my cake and could eat it too. !! And on leaded gas no less. Over the years automotive engineering started evolving emission systems- 3way cat con systems actually improved the fuel efficiency with computer controls, and myriad sensors but also adding complexity to our mandated vehicles.
I had my fun altho I missed the peak of Chevys high HP engines in 1970. The writing was on the wall for the future, detuned corporate mandated emissions, that regulations killed off anything with high HP plus insurance companies were redlining cars that were performance oriented.
It’s All about the $$$$. Greed & Corruption.
Mandate this EPA🖕🏼lol.