REVscene Automotive Forum - View Single Post - Dyno testing fuels - Big difference between Shell 91 and Chevron 94

k3mps · 12-02-2020, 08:12 PM

Well I guess I'll be switching to Chevron 94 after 10 years of Shell.
Airmiles will still be good for my Safeway runs.

I'm interested to see if I'll be able to feel a difference however my car isn't tuned; only bolt ons. Probably not on a day to day basis but 40HP difference on an S4 would be quite noticeable on the road, no?

Question for those of you in the know; if I'm pumping 91 from a nozzle that's also used for 87/89... am I pumping residual regular in the line from the last person to fill up before 91 kicks in or does the fuel go back into their respective tanks after stopping? I think I've only been to one or two Shells in town that had a dedicated 91 nozzle.

Is anyone else switching from Shell to Chevron?

12-02-2020, 08:12 PM	#60
k3mps My homepage has been set to RS Join Date: Sep 2010 Location: Coquitlam Posts: 2,030 Thanked 1,382 Times in 416 Posts Failed 73 Times in 29 Posts	Well I guess I'll be switching to Chevron 94 after 10 years of Shell. Airmiles will still be good for my Safeway runs. I'm interested to see if I'll be able to feel a difference however my car isn't tuned; only bolt ons. Probably not on a day to day basis but 40HP difference on an S4 would be quite noticeable on the road, no? Question for those of you in the know; if I'm pumping 91 from a nozzle that's also used for 87/89... am I pumping residual regular in the line from the last person to fill up before 91 kicks in or does the fuel go back into their respective tanks after stopping? I think I've only been to one or two Shells in town that had a dedicated 91 nozzle. Is anyone else switching from Shell to Chevron? Last edited by k3mps; 12-02-2020 at 08:22 PM.