While all of what Larry said is probably true, the fact that Castrol LMA is
DOT 4 and is readily available, DOT 4 works in all of our systems, DOT 4 has
a higher useful temp rating than DOT 3, Castrol LMA is Low Moisture
Absorbing, DOT 4 is not terribly expensive, and using DOT 4 would not require
you to buy a product for testing which could turn out not to work, seems to
point at DOT 4 as the best choice.
Just use Castrol LMA and avoid all the possible problems.
And BTW, make sure to change your brake fluid every coupla years.
(Insert all the usual disclaimers.)
Allen Hefner
SCCA Philly Region Rally Steward
'77 Midget
'92 Mitsubishi Expo LRV Sport
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In a message dated 10/12/99 12:21:41 PM Eastern Daylight Time,
larryhoy@prodigy.net writes:
<< Tony, you're right, that's a legend. New kits are designed to work with
DOT
3 or DOT 4 brake fluid. The only problem you MAY have with DOT 3 or DOT 4
brake fluid is if you are using New Old Stock [NOS] kits. With some older
braking systems, new rebuild kits for certain components are not available.
In that case the only recourse may be to locate, and use, a NOS rebuild kit.
Of course this means that the "rubber" in those kits may be the old formula
which might be effected by DOT 3 or DOT 4 brake fluid.
If you are talking about MGB, MGA, or MG Midget cars new kits are available
with "rubber" which has been formulated to be compatible with DOT 3 or DOT 4
brake fluid. I would imagine it would be very difficult to locate a NOS kit
for these cars, but if you could locate one, even it may not be affected by
DOT 3 or DOT 4 brake fluid. Apparently during the 1960's brake component
"rubber" parts were undergoing re-formulation so they would be compatible
with DOT 3 or DOT 4 brake fluid. >>
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