Top Tier Fuel

[Dude]

You have Costco’s in Tucson and the 91 fuel there is decent

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[Quashish]

You have Costco’s in Tucson and the 91 fuel there is decent

Yes I also trust costco 91 because of supply turnover. But the lines are always so long, I'd rather pay the extra few cents to not wait in line

 

[Robins21]

In my modified 69 Mustang defiantly, in my wife's 21 BS/BB & my 05 F150 no.

 

[Stircrazy]

I was watching a Porsche Workshop on YouTube last night and presenters were stressing the importance of using top tier fuel for engine health. I had never heard of top tier fuels. Service stations that use top tier fuel is supposed to contain additives that minimize carbon buildup in the engine. I have always purchased my gas from discounters such as Wawa, 7-11, Sheetz, and Liberty and none of those were on the top tier list, however I noticed that Marathon was. Marathon usually has fuel prices similar to the ones I use. I may be changing where I buy fuel. https://www.toptiergas.com/gasoline-brands/

are you saying top tier as in octain levels or in additive packages? I have found with my driving stle using premium fuel over regular doesn't make any difference, but if your some one who is under higher boost loads and higher rpm then it should, as for additive packages most fuel stations should be the same, I don't think it was like it was in the 40's

 

[Mark S.]

Not sure low speed pre ignition is possible with automatic transmissions, but I figure, it's only a few cents more per gallon, and gas is expensive either way.

Mainly via improved engine control software combined with exacting oil specifications, Ford, along with the automotive industry in general, slew the LSPI dragon long ago. Pretty much the entire automotive industry has embraced the small-displacement turbocharged revolution, yet when was the last time you heard about catastrophic engine failure of a stock engine due to LSPI? This is despite the fact the overwhelming majority of owners use the lowest octane fuel allowed.

If you need better performance (towing, mountains, etc.) or you simply like the changes in driveability, by all means use higher octane fuel. But don't let anyone scare you into doing so to avoid catastrophic engine failure. Manufacturers would REQUIRE the use of premium if it were necessary to prevent engine damage.

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