Shell super is plentiful in my area and I fill the Ferrari and Porsche with it along with Vp race fuel additive. The bang for the buck is on the pcar turbo engine which turns into an absolute monster and Ferrari is slightly elevated in power but noticeable. Sent from my 0PJA2 using Tapatalk
The station near me sells 93 octane v-power and I fill up there frequently with my two drivers, one supercharged and the other twin turbocharged. Wish I could say that I notice the difference between the Shell v-power 93 and other 93 octane gasolines, but I haven't.
Boys and girls: We are not all talking about the same number. Below info thanks to Wikipedia. Research Octane Number (RON)[edit] The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane. Motor Octane Number (MON)[edit] Another type of octane rating, called Motor Octane Number (MON), is determined at 900 rpm engine speed instead of the 600 rpm for RON.[1] MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern pump gasoline will be about 8 to 12 octane lower than the RON, but there is no direct link between RON and MON. Pump gasoline specifications typically require both a minimum RON and a minimum MON.[citation needed] Anti-Knock Index (AKI) or (R+M)/2[edit] In most countries, including Australia, New Zealand and all of those in Europe,[citation needed] the "headline" octane rating shown on the pump is the RON, but in Canada, the United States, Brazil, and some other countries, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI), and often written on pumps as (R+M)/2). It may also sometimes be called the Posted Octane Number (PON).
I run Vpower 93. I just ran bg44k in it. Put it in a half tank filled up but only ran half through in 24 hours. I was recently reading about a guy that's rebuilding the heads on his 355. There was carbon build up that wouldn't let valves seat properly and believes most likely a lot of cars had valve guides were done that didn't need it. I wish someone could come up with a way to get most of this carbon build up off without tearing the engine down
If carbon buildup is a concern look into adding a water injection system , your valves and combustion chambers will be squeaky clean 1994 ferrari 348 spider , third owner purchased may 2013 w/ 27804 miles
Shell 91 is the ONLY gas in Canada that is Ethanol-free. Petro-Canada 94 has higher octane but can contain up to 10% ethanol. Given that these cars were not made to sustain ethanol and given what they do to rubber parts, I only use Shell 91 Plus they are a Ferrari sponsor so it's a win-win!
You guys are missing the point, yes octane is always good but all the other chemistry in the fuel is what makes the difference Why do you think 95 octane race fuel is so expensive? It's so superior to pump gas for engine longevity and performance. I'm no way a chemist but have seen the tests first hand over the years and still get invited to closed door test sessions. Get the best fuel you can $$$$$
I need that for my fat butt with all this humid weather here in SoCal, thinkgs are getting swampy LOL Seriously I use hydrogen injection you get a few more advantages mostly speeds of flame travel speed.
