Richard,
I don't understand. Castrol is available here in the US all over the place in
20W50.
Joe
Richard B Gosling wrote:
>
> Mike,
>
> Although 20W50 is the original recommended oil for Spitfires, I have had no
> luck finding this viscosity in a decent oil at a normal motor factors.
> Manufacturers like Castrol and Penrite do 'Classic' ranges of oil, but you'll
> have to go to a classic specialist to get these, otherwise the only 20W50
>I've
> found is for 'Value' range oils, which I would not put in my mower!
>
> I have been advised by people whose job it is to know that it is definitely
> better to use a good quality oil in slightly the wrong viscosity than a poor
> quality oil in the right viscosity. I use 'Castrol GTX for basic engines'
> (15W40 I think) with no apparent problems. I was using GTX Magnatec for a
> while, but at the rate Daffy leaks I couldn't justify the extra cost...
>
> I would be very wary of aftermarket additives - particularly any that contain
> Teflon or other flaked or solid particles in suspension. If you want to know
> why, I can point you in the direction of various articles that tell you just
> what's wrong with these things. At best they are harmless, at worst they
>will
> clog up your oil galleries. Not good.
>
> I hope you get your woes sorted out! It will get better!!
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