Carl,
I have always used auto trans fluid. I think it is about 20w. Used it in my old
57 MGA, 58, 59 TR3A and 64 TR4. I know I read it in some manual somewhere along
the way.
Bob Labuz
1958 TR3A
1974 T140V
CarlSereda@aol.com wrote:
> could hardly wait for the dashpot oil thread to return!
>
> Two things since last years lengthy thread about '3-in-1 Brand' blue can (20
> wt) and
> red can (10 wt).
>
> The TR4 & TR4A Factory Manual states;
>
> Recommended Lubricants:
> bBRITISH ISLES (All seasons)b
> Carburettor Dashpots
> use 30 wt in Summer and 20 wt in Winter
>
> bOVERSEAS COUNTRIESb
> Carburettor Dashpots
> use appropriate current 'single grade' engine oil
>
> what they recommend for the Engine is;
>
> Air Temp (F.) Oil to use multi-vis
>
> Over 70 S.A.E. 40 W or 20/40 or 20/50
> 40 - 70 S.A.E. 30 W or 10/30 or 20/40 or 20/50
> 10 - 40 S.A.E. 20 W or 10/30
> Below 10 S.A.E. 10 W
>
> So I plan to use straight 30 wt in my carb dashpots year round as I will
> drive the car mostly in 40 to 80 F weather.
>
> Last time my car was running I tried thicker dashpot oil (30wt) and the car
> seemed to have more power on opening the throttle (due to restricted air
> intake from slower raising piston resulting in a momentary richer mixture and
> more power.
> When I went back to the thinner 20 wt oil in the dampers it was not as
> 'gutsy' feeling.
>
> Carl Sereda
> '63 TR4 since '74 - CT22326L .. dashpots topped off - car in pieces..
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