Hey guys,

I was wondering about the best fuel for our cars. Is there a way to focus in on specific types of dinosaurs for the best bang for a buck?

 

93 / 94 octane with the lowest amount of ethanol

 

the dead ones

sunoco and shell are usually my go-to if available, 93.

 

Entirely probable that this no longer has any bearing, but back in the day I had a C5 and it would intermittently throw a CEL on anything other than Shell or Chevron, if your question is what brand. So I still stick with those whenever possible.

 

93 Top Tier lowest ethanol possible. Shell and Sunoco both have good additive packages and are my preferred. Look for Lake Speed Jr. videos on YouTube if you want to dive deep into this.

 

Use what your country specific owners manual recommends combined with whatever is deemed “top tier” where you are. Typically this is a high octane premium fuel.

The are a variety of fuel/octane rating numbers depending on RON, MON, AKI, etc that are country/region specific.

 

Shell 93 has been consistently tested and shown to be marginally better/best - testing through dyno shows Shell 93 generates more power than other fuel brands

 

Shell whenever I can. Any Exxon product as a backup

 

In southern NH, I fill up at the local Irving with 93 Octane. Cheaper than Mobil or Sunoco. Canadian company.

 

I try for Shell or Sunoco 93. Marathon if not the first two.
Costco, Meijer, Marathon and Valero are also Tier 1 but I’ve only used them for my Tundra and my wife’s A6.

 

Top Tier. For me, typically Shell. One drive per year that is further from my house I use Sunoco.

Around here there isn't Ethanol Free Top Tier, so I choose Top Tier from Shell.

 

All the Sunoco stations around me are Top Tier. I think they may even have 94 octane at most of them!

But one thing that Top Tier doesn't assess is the condition of the tanks and pumps. That's the reason that I've stopped getting gas at any of the local Sunoco stations. All of them are in various states of disrepair. One has an obvious pump problem or clog, as it takes 5x longer to fill even a 1-gallon fuel jug -- the fuel just trickles out compared to normal. This is my closest station, so I check back every 4-6 months and it's been like this for well over a year (probably 2 years now).

Imho, there's no point in getting Top Tier-grade gas if it results in a clogged fuel filter. So, now I have to drive to an Exxon station that's newer but 15 minutes in the opposite direction from where I normally drive. The Porsche is the only car that gets this special treatment. The rest of the fleet gets filled at Wawa, where they presumably have some corporate standards to keep the pumps and tanks in reasonable shape. Or my personal favorite, Costco - but the closest one is over 30 minutes away so I only fill up there when I'm shopping there.

 

It's a DI turbo car...more ethanol the better. Cooler burn, oxygenated, higher octane. With a tune DI will gain a solid 10%+ on E85, DI+FI is looking at 25-30% gain. Without tune it's still better.

This isnt some old carb sohc engine.

 

Same thing around me, the Sunoco stations are not maintained. I remember reading they are not top Tier fuel anymore, I assume after it was acquired in 2012. They were at the top of the enthusiasts list of filling up their car in the 90s and 00s but not anymore. No more 94 octane around here either, they give you the option of 87, 89, 91 and 93. Which to me is useless. My brother has a tuned 335xi that can't run on Sunoco (at least the local stations). My last 3 cars other than the 718 have ran on the 93 there fine, but the FI car is not tuned and the other cars were NA V6s (that did require 91+ octane).

 

How about the NA 4.0 engines then?