Octane vs fuel economy

66Notchback

New Member
Would running a higher octane fuel lend itself to better fuel economy?

I've always run "mid grade" gasoline in my truck, and given the cost I'm considering switching to "low grade" or "regular".
 

Road_Runner

New Member
I have always put regular fuel in all of my cars. My cousins are mechanics, and they have always told me that regular fuel is good enough especially in new cars.
 

MaximumSpeed

New Member
We use the lowest grade and it does fine. Actually, one of my vehicles works with the E-85, which is usually about fifteen cents cheaper than standard unleaded.
 

MyMotor

New Member
One thing that the more expensive fuels have is additives that help keep your injectors clean. City driving with supermarket fuel can cause more build up.
 

Dodge Doll

New Member
One thing that the more expensive fuels have is additives that help keep your injectors clean. City driving with supermarket fuel can cause more build up.
No kidding, 'cheap' gas runs differently, and I bet it fouls injectors and what-have, it makes my car stumble and 'fart': I don't buy gas from those *ahem* sources as a result.
 

Eugene

New Member
I think the octane issue may have been applicable with older models. I asked my mechanic about this, and he said to go with what the manual recommends because that's how the car has been designed.
 

Wayne

New Member
When I have been driving in the mountains at high altitude, I find that a half and half mix of the recommended grade with high octane gas gets the best performance.
 
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