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Re: free MGB
20W50!!!
Older engines are designed with the use of 20W50. I use 15W50 by Duckham's, wich replaces their own 20W50. This will be sufficiant because the quality improvement of the stuff. Thinner oils are perfect in their own ways but to thin in oldercars. Yes they will run but you have to considder oil pressure as well, and in addition all seals wich you do like to stay in place!! (rear end seal replacement between engine and box DOES mean taking out the engine and box!)
Another thing not to forget. New oils contain dopes to keep the engine as clean as possible. Older oil types do less. No their not bad at all but any residue left by old oil wil come loose and might get stuffed in smaller oil leads, causing them to block and this can mean damage to a otherwise good engine.
I always say, run a car on period materials according to the service manual off the car, and, follow a cars manual to keep it in good shape. Never experiment with modern things unless proven okay.
I'promise you'll get hooked on the MG virus wich has one of the largest car clubs.
Regards Raymond.
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