Hello my fellow people I recently purchase a 2020 Dodge Challenger sxt. Was wondering if putting in 89 vs 87 gas would be better or not really!?!? Also chevron or shell anyone?
Not familiar with what octane Dodge calls for to be used in the SXT.
My advice -- what I do with my cars -- is just use the octane recommended by the factory, Dodge, for your car's engine.
While generally running a higher octane won't make a positive difference, and it makes a negative difference in your wallet, there have been reports by some owners claiming they noticed an improvement in how the engine runs.
I admit I'm skeptical but after you establish a base line of how the engine behaves on the recommended octane of gasoline, and after the engine is broken in, you can try a higher octane of gasoline, preferably the same brand you have been using. If it is better then it is up to you if you want to continue to run the higher octane or go back to the recommended octane.
For my years in CA I used Shell V-Power (91). All my cars required 91, at least. For my sports cars/high performance cars the engine burning Shell V-Power felt like it had it had a bit more ooomph. Not lots but not my imagination either. But at some point when I switched to Chevron Supreme (91) at least one engine ran better. This was an older car with high miles. I suspect the engine just "naturally" developed deposits which the Techron in the Chevron gasoline removed.
Talked to the dealer techs about my experience. They confirmed they preferred Shell V-Power for its additional power. But they also admitted once in a while running a tank of Chevron for the benefit Techron provided.
Also, I'm on a road trip. Not in my Dodge Challenger but in my M-B cargo van with a turbo charged engine. I have driven over 2K miles and filled up 11 times so far, and before I'm home I'll probably fill it up 8 to 10 more times. I have tried various gasoline brands and twice now have filled up with Shell V-Power. The van feels a bit, just a bit but more than my imagination, "better" running Shell V-Power. Enough that when I got home I'd continue to use Shell but for the fact Shell stations in my area charge way more than other station brands charge for 91.
I'll end with whatever gasoline you decide works best in your car's engine to always buy from a busy station. This helps ensure you get the freshest gasoline for your money.