What's the right fuel for forced-induction cars? | Fuel Facts

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Turbocharged and supercharged cars, just like those running natural aspiration, require gasoline. But those forced-induction engines need to be fed the right kind of gasoline. 

“Whenever you talk about any kind of turbocharging, supercharging,&rdq…

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For forced induction cars that sit E85 can cause more problems over time

I run 94 octane in an engine with 25 psi of boost. Gasohol not recommended. 

In reply to The Staff of Motorsport Marketing :

Indy cars ran  up to 85PSI ( generating 1200 hp) way back in the 1970's  on 100% alcohol. Without intercoolers.   
  Don't store the alcohol  in the motor.  Drain the system like sprint cars,  Indy car,  Drag racers, etc do.  
   Plus alcohol is a whole lot cheaper than gasoline.   Engines running alcohol also run cooler and cleaner Than those running Gasoline.  

wspohn said:

I run 94 octane in an engine with 25 psi of boost. Gasohol not recommended. 

While that may be true, E85  can make more horsepower than 94 octane gasoline does. Doesn't  leave deposits on the back of intake valves  like gasoline does, Doesn't  need the rings opened up like  gasoline does,  Runs cooler than gasoline does,   Is cheaper than 94 octane 

frenchyd said:

wspohn said:

I run 94 octane in an engine with 25 psi of boost. Gasohol not recommended. 

While that may be true, E85  can make more horsepower than 94 octane gasoline does. Doesn't  leave deposits on the back of intake valves  like gasoline does, Doesn't  need the rings opened up like  gasoline does,  Runs cooler than gasoline does,   Is cheaper than 94 octane 

Only one problem with that - the US has thousands of E85 stations - all of Canada  has only four.  Plus I would need a switchable tune to be able to run it.

In reply to wspohn :

Here in America a lot of cars come with a $99 option called flex fuel.  Pull up to any gasoline pump and put any fuel in. It quickly senses the alcohol % and adjusts for it.  
  Since E85 is as much as $1 a gallon cheaper  it's easy to save money.  Yes you can get a little worse fuel mileage. ( my truck it typically works out to be 2 mpg less)  but when you calculate the dollars saved versus the lower fuel mileage  I still save over $20 per tank full while the lower mpg costs me $10. I wind up with $10 still in my pocket.  
   It's not free though.  The added power has to be felt to believe.  Your tires wear out faster if you don't feather foot it.  
 Since I put so many miles on the truck I need fuel every couple of weeks.  But if I parked it for more than a  month I'd either add stabil or top it off with E10.