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LRP...

No, avoid like the plague........! Tried it in mine once about 3 years ago, once the engine was hot it was a bugger to re-start. Use Optimax, you can't get much better for the 3.2
 
Absolutely no need. Valve seats are hard enough to run with unleaded in our cars and in virtually every Porsche back to the 60s. There is a section on the Autofarm website that conclusively addresses this issue.

Richard
 
Actually yes!

I believe that there is a cross over where one 3.2 should use leaded, and another should use unleaded. I tried unleaded in mine when I first got it and found it sluggish.

Unfortunately my manual got destroyed by a roof leak and haven't replaced it yet, but I think that if you have a cat then use unleaded and if you don't then use LRP - best check though.
 
Iain,
The reason you found it sluggish might be something to do with the reduction in octane from 4* to Regular Unleaded (97-98 - vs 93), try optimax which is basically Super Unleaded and is 97 octane. Incidentally, on a recent trip to Germany I saw 99 octane Optimax at a filling station ! What are we missing out on?
Regarding the CAT issue, you are right but you won't find many 3.2's with one fitted in the uk. From what I remember these were for US and Japanese markets only. If it requires uleaded I would imagine it will say so on the inside of the filler flap.

Regards,
 
I believe that there is a cross over where one 3.2 should use leaded, and another should use unleaded.
Click to expand...

Well, here is the passage from the Autofarm website:

Q. Can I run my car on Unleaded Fuel?

A. In our opinion, yes (and it is only our opinion not necessarily that of Officialdom). The excellent quality of material used in Porsche valves and valve seats means that lead is unnecessary, so the question remaining is one of octane. In our experience (backed up by official statements and customer experience) nearly all models will run quite happily on "˜ordinary' unleaded, 95 octane, BUT if "˜pinking' is heard, move up to "˜super' unleaded, 98 octane. Aren't you glad you found our website? Think how much this visit has just saved you..... perhaps we can now tempt you to buy something else from our mail-order parts department...!!


Ignoring the humour at the end, this just about sums it up - you do not need to use LRP. However, if you are really dedicated, there is plenty more info out there. While I do not know where to find it, I remember when unleaded was introduced into New Zealand and the PCNZ rounded up a whole heap of engineering info. The definitive analysis was performed by an engineer who checked valve seats for hardness and found that with the exception of only one or two engines from the 1960s, *ALL* Porsche engines were able to run on unleaded with no ill effects.

The manual will say to use leaded 98 (as does the fuel filler flap from memory) but this is because there was no unleaded available at the time - so that is not the answer.

The octane question, as noted above, is a different issue altogether. Also, LRP will destroy cats - so don't try that.

HTH
Richard
 
Optimax in UK is 98RON
Optimax in Germany is 99RON
But they have a more powerful fuel available in Germany at Shell stations - V-Power 100RON!
http://www.shell-select.de/fr_index_fl.asp?link=/pages/station/unterwegs/vpower.html
 
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