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Regular , Plus or Premium? for 997 S 1st generation :: NEED HELP

fxin3d
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fxin3d Member

fxin3d

Posted
Posted

Hi folks,

I just leased '06' 997S for 36 months and it got 28,000 miles on it.

What kind of gas should I feed it since it's leased car.

Here is the things that I am wondering/curious.

1.Premium gas spend less fuel than Regular gas?

2. Premium gas gives the engine better performance?

3. Since it has already 28,000, there is no difference between Regular and Premium? (what about plus?)

Thank you!

PAULSPEED Member

PAULSPEED

Posted
Posted

Always use premium. In California the highest pump gas

we can get is 91. Anything lower will just add black soot

to the top of the pistons.

Running a litle racing gas will burn this soot off. Yes the pistons

get soot on them with 91 but not as much.

Paul

  • Admin
Loren Member

Loren

Posted
  • Admin
Posted

It is not a performance issue - if the octane level is too low you will get pre-ignition and detonation -- and possibly damage (a very expensive) engine.

355bhp Member

355bhp

Posted
Posted
The car is really designed for 93 octane, even with Cali. 91 the car is losing 8-10rwhp.

Dave

I recently filled up with about 4:1 ratio of 100 RON racing gas to 91 RON, which works out to about 93 RON. I like to think there was an improvement in performance, but if there was, it was slight and not really worth the extra thirty bucks! I confess though, it was fun testing the difference!

Cheers!

edward_generation Member

edward_generation

Posted
Posted
The car is really designed for 93 octane, even with Cali. 91 the car is losing 8-10rwhp.

Dave

I recently filled up with about 4:1 ratio of 100 RON racing gas to 91 RON, which works out to about 93 RON. I like to think there was an improvement in performance, but if there was, it was slight and not really worth the extra thirty bucks! I confess though, it was fun testing the difference!

Cheers!

I have only seen leaded 100 octane at the track, is there an unleaded version available?

As for my filling, I always use the best gas that is available. I get 94 at Chevron, except when I am in Washington state.

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