But lead is a good upper end lube(even if its not needed) it should last longer.
Avgas has high oct level and the biggest amount of lead per litre.
They might ban leaded petrol for cars but they carnt take the lead out of Plane engines.
Malcolm
Bob wrote:
[EMAIL PROTECTED]">Yeah I tried half a tank of unleaded the other day and noticed a bit
of a rattle under load, maybe ill stick to leaded. The motor is
standard and seems to be in perfect condition, carbies aside, so I
dont really want to trash it. When you get valve seat recession and
the motor dies, does it normally do it gracefully or do valves start
hitting pistons etc?
Monday, May 20, 2002, 11:04:06 PM, you wrote:I seem to recall this being asked before, but I couldnt find anything
in the archives, is it ok to run an L26 on unleaded?
SL> In the short term, running on ordinary unleaded would require some
SL> fiddling with the timing to avoid pinking but running on
SL> premium/Optimax/etc would present no problems.
SL> In the longer term, valve seat recession would be a problem, esp with
SL> an early head that had the original bronze valve seats. Some later
SL> heads came with steel seats and this would not be such a problem.
SL> All of the above assumes you have an L26 with the original head.
SL> L28's do not suffer any of these problems as they are designed to run
SL> on unleaded.
SL> IMHO, if you have the original L26, then just run the thing till it
SL> dies and in the meantime either get hold of an L28 to cover that
SL> eventuallity, or build up an L26 head (E88) to run on unleaded to
SL> replace the original. Personally I'd recommend the L28 option :-)
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