pixel_of_moral_decay t1_iu6nk77 wrote on October 28, 2022 at 11:20 PM

Reply to comment by objectimpermanence in Fuel 4 at Holland Tunnel by PermitCreative2034

The manual for every major car manufacturer strongly recommends top tier fuel.

As I understand it, it’s just a higher standard of detergents in the additive package beyond the federal standard. It’s otherwise the same fuel.

And yea, DFI is going to be more impacted since traditionally fuel is sprayed so it cleans the engine. DFI kinda prevents that effect.

I don’t think premium fuel would have any difference regarding detergent additives. That purely comes down to the additive package. Premium fuel is just a higher octane.

The article I linked to above shows some of the results from the AAA study. It’s pretty interesting.

Since reading that, I try to stick with Top Tier when possible, which 9/10 times is no real effort since it’s most stations. It’s not like I’m really making a serious effort.

objectimpermanence t1_iu6t57e wrote on October 29, 2022 at 12:05 AM

Yeah they used premium only because that’s what the manual said and the car’s gas cap was labeled “premium fuel only.”

But Shell’s premium grade also has extra additives (“V-Power”) beyond what their regular and middle grades have.

At most other brands, the premium grade has the same additives as the brand’s other grades.