Locally, the cost difference between 87 and 91 is typically 10-20 cents. Today it’s $4.65 for 87 and $4.85 for 91 at my preferred station (after local rewards.)
I fill up every other week, or 26 times a year on average. Meaning the average potential cost saving of using 87 over 91 every time for me is ~$133/year.
Since Ford recommends 91 for “best overall performance“, and I tow a lot, and am in hot weather a lot, the potential cost saving of using 87 some of the time for regular duty doesn’t offset the cognitive overhead of forecasting my use case or need for “best overall performance.”
I would re-evaluate that if the local price delta was more like the 0.80c/gal that it is for some of you. Or if I routinely refueled multiple times per week. Or if I didn’t use the truck at all in harsh conditions or for towing.
Quite a spread of potential impacts here. Great thread.
I fill up every other week, or 26 times a year on average. Meaning the average potential cost saving of using 87 over 91 every time for me is ~$133/year.
Since Ford recommends 91 for “best overall performance“, and I tow a lot, and am in hot weather a lot, the potential cost saving of using 87 some of the time for regular duty doesn’t offset the cognitive overhead of forecasting my use case or need for “best overall performance.”
I would re-evaluate that if the local price delta was more like the 0.80c/gal that it is for some of you. Or if I routinely refueled multiple times per week. Or if I didn’t use the truck at all in harsh conditions or for towing.
Quite a spread of potential impacts here. Great thread.