OldnDecrepit
Originally it would have used leaded (43 years ago) but what do I use now?
Standard unleaded? Any additives?
Major Ledfoot
I only run 98 in my 73 144 without hardened valve seats, and just add a splash of Nulon.
https://www.autobarn.com.au/nulon-lead-substitute-valve-saver-500ml
zzdhalla
Ditto our old 164 would get 25 plus mpg on 98 (BP ultimate) and 18 on other crap. Use a VSR additaive as a fuel lubricant and VSR retarder. I also use a fuel preserver if its going to sit for more that a fortnight. Works wonders.
OldnDecrepit
Well I've just put 20l of 98 into her. Jerry can job as she's not registered yet.
There does seem to be some additive bottle mounted in the engine bay but I'm not sure what it's for.
zzdhalla
this is the stuff I use. it works I've got 9 months out of it with my car in tassie.
http://www.supercheapauto.com.au/Product/STA-BIL-Fuel-Stabiliser-236mL/223945
egads
That sta-bil stuff is great. Combine that with a full or mostly full tank and fuel lasts at least a year, used it on the 145/144.
zzdhalla
Yes it is one of my standard recommendations to historic societies and museums when discussing "function"
Slowbrick
95 or higher if the hip pocket stretches. The old "Super" grade fuels were ~98 octane so if your 164 calls for Super leaded fuel then best bet would be to run 98 grade.
+1 for sta-bil. I use it in the garden equipment that doesnt get used that much and it keeps the fuel nice and fresh.
OldnDecrepit
I put 20 litres of 98 in to top up the tank. Looks like I need some additive too.
Can't see the need for sta-bil as the car will not be stored but driven hopefully weekly.
Spac
Lots of evidence suggesting that lead replacement additive is a waste of money. Basically, people are rack up lots of kays on old iron heads with no additives, and not having any problems.
Super was 95 or 96 octane, depending on when and where. I would experiment with different fuels - obviously pinging should be avoided, but also check fuel consumption. Sometimes a more expensive fuel will end up cheaper because you use less of it. Sometimes not...
zzdhalla
The main benefits of lrp is lubricant for the valves and carbs