Premium Gas?

[tcoradeschi]

Well. This Mech Engineer runs regular in everything except the K100 RS, which has no knock sensors. But my 986 only has 193,000 miles on the clock, so I’m just a noob.

[10/10ths]

…..and all modern cars have knock sensors and can run 87 octane unless you see a label on the fuel filler cap that says, “MUST” use a specific octane.

If it is just a “recommended” label, then you are fine with 87.

Now, that part of it is just the knock and damaging engine part of it.

The detergent part of it is less exact. Many companies only put their best fuel additives in their premium fuel.

But, you can fill up on 87 and drop a bottle of Techron or Red Line or Driven fuel injector cleaner in the tank and you will be fine.

Of course, that brings the cost up to just buying premium fuel.

Don’t overthink it.

[husker boxster]

Originally Posted by 10/10ths

Of course, that brings the cost up to just buying premium fuel.

The OP doesn't mention WHY they want to use regular instread of premium. I assume it's because of the price difference.

For arguements sake, let's say premium is $1 / gallon more expensive than regular. A fill-up will cost you a whole $15 more for premium. If you're scraping to save $15 once or twice a mo, a Boxster may not be the proper vehicle for you.

[Gilles]

Originally Posted by husker boxster

The OP doesn't mention WHY they want to use regular instread of premium. I assume it's because of the price difference.

For arguements sake, let's say premium is $1 / gallon more expensive than regular. A fill-up will cost you a whole $15 more for premium. If you're scraping to save $15 once or twice a mo, a Boxster may not be the proper vehicle for you.

Where we live SoCal, and usually the difference between Premium and Regular is about $5 (max) per tank, and needless to say, we always use Premium in all the cars..

[husker boxster]

Originally Posted by Gilles

Where we live SoCal, and usually the difference between Premium and Regular is about $5 (max) per tank, and needless to say, we always use Premium in all the cars..

Wow!

Move to Nebraska. It's generally 50-75 cents at most difference. Thought I was being generous at $1 (and it made the math simple).

[tcoradeschi]

Originally Posted by husker boxster

The OP doesn't mention WHY they want to use regular instread of premium. I assume it's because of the price difference.

For arguements sake, let's say premium is $1 / gallon more expensive than regular. A fill-up will cost you a whole $15 more for premium. If you're scraping to save $15 once or twice a mo, a Boxster may not be the proper vehicle for you.

Well, for some of us, that would be $15 a week, and that’s reasonably serious beer money.

At one time, not too incredibly long age, I believe that PCNA had a statement on their website noting that regular fuel was just fine, given modern engine controls.