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Everybody has a recommendation and they are all different. I couldn't figure out who to believe so I went with the guys who made the carbs and bought a bottle of genuine SU branded dashpot oil.
What CJD said. The only thing that didn't work was WD40. ATF, 20w, 30w, 10w-30, 10w-40, 5w-30 any medium grade oil/lubricant will work fine. I have tried many different, unless you go way too thick or way too thin you won't notice a difference.
What CJD said. The only thing that didn't work was WD40. ATF, 20w, 30w, 10w-30, 10w-40, 5w-30 any medium grade oil/lubricant will work fine. I have tried many different, unless you go way too thick or way too thin you won't notice a difference.
Not mentioned yet is the reason for damper oil...It's to slow down the rate at which the air valve rises. During that short interval of time, which is really short, the slow response actually enrichens the fuel/air mix which is condusive to smooth acceleration.
ZS carbs, btw, do best with engine oil rather than any real thin stuff...maybe the difference is because of the ZS carbs Air Valve diaphragm's complete sealing of the suction chamber
I just realized that whale oil was still available when these cars were built. Wonder if that would have been a recommendation if we had internet in the 60's?
I just realized that whale oil was still available when these cars were built. Wonder if that would have been a recommendation if we had internet in the 60's?
My Dad used 3N1 oil in his Jag XK140FHC, and his '49 MG TC, I used it in an MGB, TR3B and current TR3B because thats what he used. It may have had something to do with being in Fairbanks with the XK140 (daily driver in '58-59) but it never failed....
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