Gasoline mileage

Triedaq
Wed, 18 Jan 2023 16:52:41 +0000
General Discussion

We were on a road trip with interstate driving. I pulled into a Shell station and there was a note on the pump that the only fuel available was the premium 93 octane. I pumped in 10 gallons.of the 93 octane. Our gasoline mileage went up from a little over 25 mpg to over 30 mpg. On the next gasoline stop, I pumped in 10 gallons of 87 octane and the mileage dropped back to 25 mpg.
While I liked the higher mileage on premium 93 octane, the price difference over 87 octane doesn’t justify the cost. The owner’s manual for the Sienna allows for the use of 87 octane. My other concern is that using 93 octane may get the Sienna spoiled. Mrs. Triedaq bought expensive food for our dog and now the dog turns up his nose and won’t eat the house brand we had been feeding him. I don’t want to have the same problem with the Sienna.

35 posts - 20 participants