Originally Posted By: friendly_jacek
For a 11 Prius?
How about Chevrone gasoline?
Yes, it is a 2011 with 20k. I have used three bottles of Gumout Regane HM during that period (at the 6k, 9k, 16k marks). I had originally planned to add a bottle every 5k but as you can see, I have not been good about remembering.
I average about 3k/mo and go through about 75 gal of fuel every month. The price difference between Arco and the Shell or Chevron top-tier stations I typically use is 15 cents/gal. Therefore the price difference between fueling with top-tier and generic is about $14/mo.
When purchased in a gallon, FP Plus is $61/gal and RLI Bio-Plus Injector Cleaner is $68/gal. Even for RLI that is $0.53/oz—and even at a 1 oz/10gal ratio it would only cost me $4.25/mo for the additive. In theory, generic gas + RLI additive should be superior to top-tier fuel w/no additives, right? So, I should be saving myself $10/mo by adding additive?
Also, I was not aware that Amsoil PI can be used at every fill-up. I believe the old Amsoil PI was setup that way, but the new PI is to only be added once every 4,000 miles.
Thanks.