Castrol GTX 20W/50 hasn't been available in the UK for dozens of years. It
became 15W/50 which was an improvement and fine by me. However a few years
ago it changed to 15W/40 which is like water by comparison and had an impact
on the hot idle oil pressure of the V8 which I didn't like. Whilst Castrol
Classic is available in XL 20W/50 (it even comes in the original metal can
and in gallons) it's pretty expensive. The other sources of 20W/50 tend to
be 'no name' brands or aviation grade!
PaulH.
----- Original Message -----
>> *** New problem: It seems that the 20W50-grade oil for our older cars
>> is now more difficult to get at!
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