I have a 911SC Porsche (year 1980). I have changed to using unleaded petrol. Will there be any problem ?
Answers:
You're fine with unleaded. Everyone I know with old Porsches (including me) uses it all the time. The octane is more important than the lead or non-lead.
Don't even think about worrying about this.
depends wheter u are supposed to use unleaded in it .if you are apart from pinking like mad u may have problems .best ask your porsche dealer
you should be able to get away with having the timing adjusted, you may still have to use a lead additive tho'
i would have thought so, if you still had some leaded fuel in the tank you might be ok so far but dont put anymore in till you have cheched out what u need
Yes if its not converted to run on unleaded,you could wreck the engine or it might go on fire !
depends on if valve seats have been done if u not sure use an additive
Not if the engine has been converted to run on unleaded fuel, but if it hasn't, you'll have to buy a fuel additive to put in as well. You can get a variety of makes at your local petrol station. If your car isn't designed to run on unleaded petrol, you can damage your engine pretty substantially by running it constantly on unleaded without an additive. A week or two here and there shouldn't make too much difference, but still wouldn't risk it.
I doubt that it's supposed to run on leaded fuel because that's been out since 1973 in the United States (I know you're not in the U.S. - but is Europe 7 years back on that?)
If it is supposed to run on leaded fuel, you will eventually wear out the valve seats if you do not use an additive. It will take a couple of years typically to wear out. I drove an old Mercury Montego for several years on unleaded and I never noticed an issue. If I were you, I wouldn't worry about it.
Yes. Get a lead additive at the car parts store and use it religiously. After a full rebuild you can use unleaded.
The only issue with switching from leaded to unleaded gas is that cars without hardened valve seats would need a valve job a little sooner. American cars all went to hardened valve seats in the late 1960's. I believe that Porsche went to hardened valve seats during manufacture of the SC, but I am not sure. If you recently went to unleaded, lead deposits on the valve seats will last for some time. If and when you ever get a valve job done, you can ask the mechanic to check the valve seats for wear, and if they are worn, have them replaced with hardened seats. I don't believe this will be necessary; however, as I personally know a couple of individuals in the US driving older SC's with more than 150K miles on the original engines. Both cars have been run exclusively on unleaded gas, without lead additives, for at least the last 100K miles, with no apparent ill effect.
Drive it and enjoy it.
You never want low quality gas in a porsche Engine thats which causes 10k dollar problems, no matter the year it still uses a high tech and high peformance engine which desires highest petrol. but if you really need to pay less then just use the middle or 87 fuel or just use 81 then 91then 81 then 91 and us a pattern.
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