Quote:
Originally Posted by rmay635703
Thing is higher octane does not necessarily increase economy.
|
Not if the higher octane is running on summer fuel it's easy to tell if the 91/93 is on summer fuel still as the price will be 20/30 cents more then 87 octane
i.e 87 is 2.599 gallon while 89 and 91 is 2.799/2.899
summer fuel normally nets 2-3mpg more then winter fuel..
example Costs;
(city/highway)
2.599 18.5MPG
0.1404864864864865/miles
91octane 23mpg city
2.899
0.1260434782608696
27-31.2MPG
0.107 to 0.092 per mile.
would you rather pay more up front OR pay more per mile?
using 87 octane cost $3.22 per 23 miles in the city per gallon
using 87 octane costs 3.78-4.36 on the highway per gallon
18.5 is the confirmed mpg which others get with "87 octane"