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Find and Read your Owner's Manual!
I acquired (most of) the owner's manual for my 79 SC, and have been reading through it. There are a lot of things I didn't know, as well as some things that are generally awesome.
Awesome charts of HP, gear ratios, etc. http://forums.pelicanparts.com/uploa...1337797641.jpg http://forums.pelicanparts.com/uploa...1337797648.jpg Go get a copy and read it! |
When Porsche switched to the 3.2 engine, they added electronic fuel injection and required Premium gas. I too was surprised when I bought my SC that I could get away with 87. That can come in handy money wise when you are filling up 21 gallons. Here in CT 93 octane cost $4.30 a gallon......you do the math :(
I too was impressed with the owner's manual. In all the cars I have owned, I have never seen a power graph and shift point graph. |
I've read that Premium gas is cheap insurance against engine knocking on older less than perfect running engines.
Also read that you may not feel or hear it knocking, but damage can be done just the same. If you hear or feel some knocking it's too late, the damage is done. The most curious thing I found out when reading my owners manual, was the location of the intermittent windshield wiper control. Somehow, it was alway behind a blind-spot, and located on the dash just behind the steering wheel. Not where I would have expected it at all. |
Best opening line in the history of owner's manuals:
Judging by the car you have chosen, you are a motorist of a special breed, and you are probably no novice when it comes to automobiles. I always thought the sentence following that should have been: Which is good, because our heating, ventilation and air conditioning systems are designed to confuse and befuddle the finest minds. Brian |
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Assume you drive 5000 miles/yr Assume you average 20 mpg Assume 30 cent difference regular to premium Therefore 250 gal/year. Savings of using regular over premium: $75 Cost of a new engine overhaul: Thousands ($10K??) I am really cheap. But we are talking about $75-$200 a year depending on how many miles you drive. You probably spend $75 just purchasing the oil every time you do an oil change. I don't risk it, I use Premium. |
I don't know if a modern 911 manual has the same detail. Can anyone chime in ?
Anyway, in the "old days" car manuals were a lot more technical. I remember seeing the manual for my father's early 60's Beetle and it had detailed cross drawings of the body, engine and gearbox ! How many would care about that now ? |
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When you look @ octane requirements, make sure you are quoting RON, MON or PON (RON+MON/2) figures. PON (US & Canada) figures are about 4 or 5 lower than RON (European) but are equivalent.
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"Saving money" by using 87 octane instead of 93 is fool's economy. |
Well, there you go. I hadn't done the math, but now that I see it, the best premium gas, only.
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