Gas prices are going up daily. Does anybody have knowledge on gas quality &

[tantricia44]

price. Me & my Big sis was having a debate on gas quality & the age of the car. I use Prem + for my old Toyota all paid off but older than time. I feel that my car runs better if I use a more quality gas. My OLDER SISTER, claims that it doesn't make a difference b/c my car is old. If it was her NEWER car which according to details of her car make; it says that she has to use the best quality gas for her car. Ok, I understand that her instruction for her newer car uses only 93+ gas but wouldn't it make my car run better if I to use the good stuff for my older than time paid off car. If not, I'll just save my monies to buy the cheap stuff. Please, if anybody has any knowledge in this area please give me you input.  Thanks